Dodge Ram Low Air Flow from AC Vents

12:06 pm Air Conditioning, How To Auto Repair


©  Summary: This article is about Dodge Ram pick up trucks that have a common air-flow problem with the HVAC (Heating Ventilation & Air Conditioning) system. The problem causes little heat (or AC depending the time of the year) to flow through the vents. The blower fan can typically be heard with no abnormal sounds, although no air seems to be making it out of  the vents. We go over parts that need to be removed to gain access to replace a common failed component.

A common problem for the Dodge Ram pick up truck is to have low airflow even though the blower fan can be heard loud and strong. Usually the problem is because of a broken fresh air door – AKA recirculate door. The fresh air door is located behind the glove box area. What can happen is the door can break and fall down covering the blower fan, essentially sealing off  all air-flow. That’s why the blower can sound normal on all speeds, but little air can be felt from the vents. The broken door below shows the point at which the break is common.

8/17/2012 Update *Important – since this article was first written we have discovered and started selling a kit that allows the repair to be done right in the vehicle. Click on the image to the left or the following number AAA9 DLT, for more information on the replacement door kit. The replacement door has steel construction instead of the weak composite material used from the factory. So it’s built to last. The kit works on 2002-08 Dodge Ram pick up trucks. Installation is done after removing the glove box – the dash does NOT have to be removed. 

In the image below, the x’s mark most of the trim pieces that need to be removed to gain access to bolts which hold the dash. One that is not marked is on the top of the dash, it’s the large trim panel which is not visible in the picture. This can be an easy job to do at home since the air conditioning system does not have to be discharged. In fact nothing on the firewall side has to be disturbed.

Note that the steering coloumn is unbolted and allowed to drop down and is not unbolted at the steering coupler. Undo the stop light switch to prevent stress on the wiring when the dash is swung.

Once the trim panels are out of the way, it’s fairly easy to find the bolts that need to be removed to pull the dash. The fresh air door or recirculate door assembly located directly behind the glove box can now be accessed. There’s only two Phillips screws securing it to the case. After removing those, unplug the actuator and give the door assembly a slight tug. Be sure to remove any debris from the blower fan cage before installing the replacement door assembly. The picture below shows how far the dash has to be pulled back to remove the door assembly – notice it is actually removed.
Below the new door assembly can be seen back in position and the dash can now be re-installed.
Reverse the removal process of the securing bolts and trim panels and the job is done.

The tips in this article are very basic and NOT intended to be a complete guide for servicing your AC system. Please refer to a repair manual for further instructions.

Related Car Repair Articles and Products

Basic Car AC Gauge Set Hook-Up

Adding Freon to Car AC – Gauge Readings Explained

Car AC Not Blowing Cold Air – Charging Tips and FAQ’s

Other AC Articles


274 Responses
  1. Todd Vicino :

    Date: June 5, 2010 @ 12:11 am

    Thanks for the heads up, this would have drove me crazy. I have to fix the exact problem in the morning. Todd Vicino

  2. George :

    Date: July 8, 2010 @ 6:45 pm

    I have had this same problem for about a year. Finally fixed it used a t-20 torx bit and about 5 min. of my time. Dropped blower motor, found broke air door, broke it in half with my hand and pulled it out blower hole. Not worth replacing the fresh air door in my opinion everything works great their will just no longer be any difference between a/c and max a/c. Plus I will not give Dodge the gratification of selling me another junk air box part for $42 on my out of warranty 2006 model truck.

  3. Shane :

    Date: August 30, 2010 @ 9:05 am

    Hey George, any new issues since posting this?

  4. dennisb - Auto Tool Sales :

    Date: August 30, 2010 @ 9:18 am

    Shane, to answer for George… The only issue I could see is that MAX efficiency for AC or heat will never be obtained since he removed the fresh air door. The system without the benefit of the door ever being closed to the outside air has to heat or cool the outside air instead of recirculating the inside air and either heating it or cooling it more efficiently. In short the ac will never cool as well and the heater will never heat up as much as it should.

  5. Joel :

    Date: February 5, 2011 @ 10:46 am

    What about the passenger side air bag?

  6. Clyde :

    Date: June 4, 2011 @ 2:56 pm

    Awesome help. I went the easy route dropping the blower motor and slipped the broken door out. If the truck’s owner wants re-circulation back then we will order the new door and pull the dash. Thanks so much for posting this helpful thread. You saved me a bunch of time today.

  7. Phillip :

    Date: July 4, 2011 @ 12:46 pm

    i un-bolted the blower motor,and was able to wiggle it out.just keep it on recirculate,it blows harder any ways.

  8. george b :

    Date: July 30, 2011 @ 4:35 pm

    my 2003 dodge ram 1500 blows cold on the left and warm on the right side of my vents what should i do to fix it . i have work on it and can not find the problen .

  9. dennisb - Auto Tool Sales :

    Date: July 30, 2011 @ 7:46 pm

    George, You don’t really say what you’ve done to it. I would first check the refrigerant level. Low refrigerant ( a low charge) can cause a variation between left and right sides, especially on dual zone systems. Good Luck.

  10. Michael Sueiro :

    Date: August 2, 2011 @ 8:41 pm

    How long do you think the overall job takes to fix the problem the first George spoke of? Taking down the dash & replacing the fresh air door. Thanks a bunch for the help.

    Mike Sueiro

  11. John Brobeck :

    Date: August 6, 2011 @ 4:45 pm

    I have 2003 dodge Ram 3500. Air works good on the driver side and nothing on the pasenger side. The truck has control for each side. When you increase the temp on the passenger side it blows very hot but will not cool down. Also when i leave the ignition on it has a vibration sound that comes fron a box with lots of wires to it mounted on the firewall on the passenger side. Not sure what this is. It humms amd then stops and starts again is 30 seconds or so?

  12. dennisb - Auto Tool Sales :

    Date: August 7, 2011 @ 10:25 am

    John, this article is on low airflow. You may want to see some of the other AC articles on AC. The first thing I would check is refrigerant charge, since this can effect ONE side not cooling as well on dual zone systems. The vibration noise or humming is most likely the blower motor. There could be leaves getting into the fan or the motor itself could be failing. Good Luck.

  13. Winston :

    Date: September 1, 2011 @ 9:31 pm

    Something is wrong with my 2003 Dodge Ram 1500. When it is idle the a/c is warm, but when I driving it kind of cools off a little. I released all of the freon and then tried to fill it back up with R134 freon and that doesnt solve my problem….still doing the same thing. What should I do next?

  14. dennisb - Auto Tool Sales :

    Date: September 2, 2011 @ 6:41 am

    Winston, first… releasing the refrigerant is illegal. It harms the ozone and is just one reason that the many want tighter controls on access to 134A. The proper way to remove refrigerant is to recover it with an AC machine for recycling. Some techs will remove ALL the refrigerant (with an RRR machine) then evacuate the system with a vacuum pump and charge with the specified amount of refrigerant. However, the first step should have been to diagnose the A/C system with the gauge readings to see what the problem is. We have information regarding this that is linked above at the bottom of the article called “Adding Freon to Car AC – Gauge Readings Explained”. Understanding the gauge readings is the logical/smart way to approach an AC problem. Usually when a system is doing what you are describing the condenser fan is not working or the compressor is not pumping sufficiently. There could sometimes be a malfunctioning expansion valve. Without diagnosing the system based on actual “readings” it’s anyone’s guess. Good Luck.

  15. Rita :

    Date: November 12, 2011 @ 5:45 pm

    Thanks so much for posting this. We were unable to get the dash completely off of our 2004 dodge ram but I was able to feel that the fresh air door was broken. We broke the fresh air door up and removed it. Will see about replacing it later but for now we can at least use the defroster.

  16. dennisb - Auto Tool Sales :

    Date: November 12, 2011 @ 7:31 pm

    Rita, you may be happy with it like that. The AC won’t get quite as cold and the defrost will not work as well but for an inexpensive (and quick) fix, removing the door completely may just suffice. Good Luck.

  17. Bob @ SPI :

    Date: November 30, 2011 @ 4:45 pm

    2008 dodge ram 1500 heater air flow comes out of defrost vent when on floor vent. I have replaced the heater control assembly. Do you have any ideas what could be the problem?

  18. dennisb - Auto Tool Sales :

    Date: November 30, 2011 @ 5:17 pm

    Bob, usually if there is a vacuum leak the air will blow out the defrost (as default). I would look for a vacuum leak on the engine side of the firewall. A hissing sound may be heard if the leak is large enough. Good Luck.

  19. Phil :

    Date: December 26, 2011 @ 1:25 pm

    Dennis, 2004 Ram 1550 QC 5.7 I have a some what simular problem, I have verified that the low side is at pressure with a top off can of refrigerant, I have the problem of it takes forever to get cold, I can hear the doors oppening and closing when I cycle through the controles. The fan I think blows fine in AC and heater modes. It takes like 10 minutes or more to get cool not acting like when I bought it new.

  20. Erich Schroeder :

    Date: May 13, 2012 @ 8:11 pm

    AC was blowing fine, just not cold. Repair shop replaced the compressor and clutch switch. Now it doesn’t blow at all though you do hear it as you describe above. Also puts out a loud squeak intermitently. Is it possible they broke the fresh air door in doing these repairs?

  21. dennisb - Auto Tool Sales :

    Date: May 13, 2012 @ 8:38 pm


    The compressor and the cycling switch is located under the hood and the recirculate door is behind the dash. There would be no reason to think that the shop broke the door while replacing the parts in the engine compartment. Sounds like two different issues. Good Luck.

  22. Paul :

    Date: June 10, 2012 @ 11:29 am

    I have a 2003 Dodge Dakota and this thread describes my exact problem. I am not a mechanic or nor do I have the tools to do this job. Even if I did I do not have the time to take it on due to heavy travel schedule. Would anyone have an idea of the estimated cost for a dealer or local mechanic to repair it? Thanks!

  23. Marty :

    Date: June 18, 2012 @ 12:34 pm

    I was so elated to find this info here today. I have had this same problem for the last few days. I called the Dodge dealership about putting in a new fresh air door and they said about $800.00. I Can’t cover that right now and today it is supposed to hit 112 here in AZ. I pulled the motor and was able to get the door out and BAM! I am glad we have these sites available to get help. A credit to you also Dennisb for taking the time to help people with free advice. People don’t seem to help fellow countrymen anymore without getting in there pockets.

  24. dennisb - Auto Tool Sales :

    Date: June 18, 2012 @ 12:51 pm

    Marty, thanks. Glad I could help. Keep us in mind for your future automotive tool needs.

  25. Steve :

    Date: July 1, 2012 @ 2:33 pm

    Thanks for the info, this explains the exact problem I’m having with my 06 Ram pickup. Are there better sources for OEM parts, specifically the air door, than a dealer?

    Thanks, Steve

  26. dennisb - Auto Tool Sales :

    Date: July 1, 2012 @ 4:50 pm

    Steve, I haven’t shopped around for alternatives on this. It’s possible, but there may be modifications needed to make other than OE parts work. Good Luck.

  27. Mike Heflin :

    Date: July 3, 2012 @ 3:35 pm

    Of the suggestions and info above I was wondering if this like the problem my friend has with his 2001 Ram 1500 Magnum V8 truck. His vehicle has the following problem. With the air conditioner on it is okay at the lowest speed of the fan setting. When someone turns the fan setting to the any of the higher settings the air system is still okay for about 10 seconds, then the heat comes through the vent. I think I do hear something like a door? or something closing right before the air conditioner cool air turns to very warm. Is this something that described above can cause? Thanks!

  28. dennisb - Auto Tool Sales :

    Date: July 3, 2012 @ 4:35 pm

    Mike, maybe not a completely broken door. Sounds like a door that flops wherever the air forces it. Maybe where the actuator attaches there’s a problem. I would check in that area. Good Luck.

  29. C. Miles :

    Date: July 4, 2012 @ 11:33 am

    We have a 2003 3500 WT Cummins 5.9L with A/C. The A/C used to not blow out the vents (broken door?), now when you turn the A/C on the compressor doesnt even kick in and it’s like the control panel for the Heat/AC is out, but the heat works great. Were in TX so the A/C is critical now. Your help is appreciated.

  30. dennisb - Auto Tool Sales :

    Date: July 4, 2012 @ 5:23 pm

    The most common cause of the compressor not coming on is low refrigerant. The system won’t run with low pressure by design to help protect the compressor. I wold check the pressure readings and go from there. Good Luck.

  31. Mike Holloway :

    Date: July 4, 2012 @ 10:45 pm

    One problem with just removing the broken door and not replacing with new is no control over airflow and you hear the roar of the blower motor.

  32. dennisb - Auto Tool Sales :

    Date: July 5, 2012 @ 6:27 am

    Mike, the biggest disadvantage of just removing the door is that you will never be able to have Maximum AC (also called recirculate). By always conditioning the outside air, the system can never be as efficient.

  33. ed bouwmeester :

    Date: July 5, 2012 @ 11:05 am

    Low air movement but the fan is working fine. Whats the quick fix as far as checking to see if it is the door and how to get it out?

  34. dennisb - Auto Tool Sales :

    Date: July 5, 2012 @ 11:33 am

    Ed, The door can be checked (behind the glove box) by looking for the door movement and listening for the thud when it closes. Do this by slowly switching the AC back and for the from Max/Recirculate to normal air. See the 2nd comment from George on how to do a quick door removal. However, I recommend fixing it right and replacing the door like outlined in the repair article. Good Luck.

  35. MadMaxx :

    Date: July 5, 2012 @ 6:28 pm

    I just replaced the blower motor resistor and that solved half of my problem… at least the blower will turn off fully now. I opted to finish the job by removing the 3 screws to the blower motor on the passenger side, lowered the blower out, reached up inside and jimmied the door around and pulled it out the same hole… Replaced the blower motor and its all gravy!

  36. JoeF :

    Date: July 5, 2012 @ 8:17 pm

    I have a 2003 quad cab and my air door just crapped out and was blocking the air flow to the vents. I dropped the fan motor and pulled out the busted door. It was 102 degress here today and the air was ice cold … no way I am pulling that dash out to replace the part. Thanks for posting this info, it saved me a lot of time and aggravation.

  37. Garett :

    Date: July 6, 2012 @ 4:05 pm

    I have a 2009 dodge ram, my ac suddenly went out, When i turn it on i hear a clicking/thumping noise coming from behind the ac dials and my cup holder. It will blow air out of the front vents for about 2 seconds then the clicking/thumping noise happens and no air. Air only comes out the floor vents, it wont blow air from the front vents or defrost. Im not sure what the noise is or how to fix it

  38. dennisb - Auto Tool Sales :

    Date: July 6, 2012 @ 5:12 pm

    Garrett, sounds like an HVAC door actuator/motor has failed. HVAC motor’s are designed to control the mode (which vents the air comes out of). Since that is one of your issues along with the noise (which is pretty common with failed door motors) it makes sense to me.

    Some are harder to get to than others. Sometimes they are easy and sometimes the dash has to come out. There are several, so narrow it down by following the noise to pinpoint the one giving the problem. Good Luck.

  39. Danny Ray :

    Date: July 6, 2012 @ 9:33 pm

    I have a 2003 and like the other guy on here when sitting idle my ac doesn’t cool, but moving its cold as ice. I used an ac gauge and my levels are fine. I too have the problem I belive with the ac door my drivers side blows colder than the passenger. What will cause the ac not to blow cold when idle a vacuum hose? You can here the conmpressor kicking in and out a little too often when its at idle but its not cooling when I raise the rpm then it starts to cool.

  40. dennisb - Auto Tool Sales :

    Date: July 7, 2012 @ 8:10 am

    Danny, sounds like the main problem might be not enough air-flow through the condenser. The fan might be bad, but the high and low readings should be going too high (if that’s the case). I would check the high and low readings and the operation cooling fan motor. The fan that is for the condenser not the one for the radiator. I believe they are separate on your truck. The condenser is off to the side. The readings may be going too high because of the fan and the high pressure switch could be shutting down the compressor to protect it. Good Luck.

  41. Danny Ray :

    Date: July 7, 2012 @ 11:14 am

    You are right, the fan wasn’t working blew a fuse out. I put a new one in and it blew again right away. I pulled and reseated the relay to may sure that wasn’t the problem and fixed it. It’s been working ever since.

  42. dennisb - Auto Tool Sales :

    Date: July 7, 2012 @ 6:44 pm

    That’s great. If the fuse blows again though I would install a new fan motor. If it draws excessive amps it will blow the fuse repeatedly. Good Luck.

  43. LuisC :

    Date: July 7, 2012 @ 10:37 pm

    My 03 Ram blows cold air on drivers side but not on left. I have charged the a/c but still doesn’t help. Also once charged it seems to drain very quickly I’ve checked for leaks but don’t seem to find any.

  44. dennisb - Auto Tool Sales :

    Date: July 8, 2012 @ 8:06 am

    Luis, It’s common for some vehicles to have a big difference in vent temps when the system is low on refrigerant. It could also be an actuator, but I would concentrate on finding the leak and repairing that. Since you know the system drains – you know there’s a leak. The most common leak in these trucks if there’s nothing obvious under the hood is the evaporator core. I would then vacuum the system down properly and put the correct amount of Freon in. After this is done, it’s likely that the vent temperatures will be more uniform. Good Luck.

  45. Joe Bingham :

    Date: July 8, 2012 @ 7:54 pm

    I have a 2005 ram and was driving one day and heard this sound come from in the dash then the air was not blowing as hard as usual. I was thinking maybe a piece of paper got into the return but not sure, had a “mechanic” tell me it was impossible for that to happen. So I guess I am going to check the door next and see if that helps. I am in Texas and we need our A/C here.

  46. Joe Bingham :

    Date: July 8, 2012 @ 8:27 pm

    Well just took the blower motor out and sure enough the door was just laying there so I took it out and replace later. I am glad I found this site. THANKS

  47. Paul Passmore :

    Date: July 9, 2012 @ 4:17 pm

    Great explanation of the problem. I also pulled the blower motor which is located below the glove box and sure enough the door was blocking airflow. Slight pressure in the center of the flap was enough to break it making it small enough to fit through the hole. Thank you!

  48. Michael J :

    Date: July 10, 2012 @ 7:24 pm

    Thanks just pulled my blower motor and there it was broken. I have not replaced mine. Did you say the only thing that it will effect is the circulation of inside air? My truck only has 32,000 miles. It looks like this should be recall since there is so many with the same problem.

  49. dennisb - Auto Tool Sales :

    Date: July 11, 2012 @ 7:35 am

    Michael, yes it will cause the recirculate to NEVER work, meaning the AC won’t get as cool and the heat won’t get as warm. As far as the warranty and recalls – many things should be a recall, but as long as it’s not a safety issue the manufacturers have an incentive not to recall them. Chrysler’s warranty is 3/36 whichever comes first. After that we are all on our own unless you have purchased some sort of aftermarket extended warranty. Good Luck.

  50. bignasdy :

    Date: July 13, 2012 @ 11:51 pm

    I have the same problem.99 1500 . Will pull blower tomorow. I also have a vacuum leak where……harder acceleration will default the A/C to defrost until the engine quits pulling so hard. Any idea where this leak may be…OR hows about a good way to find it? Thanx alot in advance!

  51. dennisb - Auto Tool Sales :

    Date: July 14, 2012 @ 7:32 am

    Sounds like a common vacuum leak. Could be on the inside of the vehicle or on the engine side. Most the time the leak would be in the engine bay because of more harsh conditions causing the vacuum line to fail (like heat, cold, chemicals etc). Usually I would look for the vacuum line going through the firewall on the passenger side under the hood. Follow it and look for breaks. Also run the vehicle and listen for a hissing sound. Not on the Ram, but on some GM vehicles (Corvette & others) I’ve found plastic vacuum lines routed underneath the battery. Fumes and sometimes acid goes down on the line and makes them brittle and they break. Plastic lines can be replaced by using a small diameter rubber hose and slipping over the outside of the plastic line. A little super glue, can then be applied on the outside where they join, just to keep them from slipping apart. Be careful not to allow the super glue to get inside the line and restrict the vacuum. Good Luck.

  52. jim fig :

    Date: July 18, 2012 @ 12:14 pm

    I have a 96 dodge 1500 cargo van,my heat or air conditioning blower fan speeds work fine but little air comes out of the vents. What should I look for? Thanks, Jim.

  53. dennisb - Auto Tool Sales :

    Date: July 18, 2012 @ 12:35 pm

    Jim, even-though you have a VAN and not a truck, it could have a broken door like the article describes. I would look for a broken door Good Luck.

  54. Milo Estrada :

    Date: July 18, 2012 @ 10:14 pm

    I have a 2004 dodge ram hemi. My issue is when I’m driving and the AC is on I can smell the fumes coming from the car/truck in front of me…. any solutions?

  55. dennisb - Auto Tool Sales :

    Date: July 19, 2012 @ 7:19 am

    Milo, it’s normal to have some outside air enter the passenger compartment so naturally if there’s a gross emitter (a vehicle that pollutes excessively) ahead of you, you’re gonna smell it. You may minimize the amount of outside air entering the passenger compartment by selecting MAX air or recirculate. You may still smell anything that’s in the outside air because the passenger compartment is not totally air tight. If you were smelling excess fumes/smoke from your own vehicle there could be an exhaust manifold leak. There could also be an oil leak (most commonly from a valve cover) that is burning off when it touches the top of the exhaust manifold. In that case, repairing your own vehicle would help. Other than that if you’re behind a stinky vehicle – don’t follow so close! Good Luck.

  56. ken :

    Date: July 22, 2012 @ 10:02 pm

    You can actually fix this problem without removing the dash in less than an hour by removing the glove box, fan motor (3 screws) and the actuator (2 screws), all you need is a flashlight, Stubby Philips and regular (I actually used a stubby ratcheting screw driver with changeable tips) and a short pry bar. you also need to be a little limber… first turn the key on and turn the air control to re-circulate (lower two positions) next remove the door jamb, the fan and glove box. now shine the light through the glove box opening… remove the broken door by reaching up through the fan opening and turning it counter clock wise and tilting it into an upright position and it will come out easily, if part of the door is still attached to the control shaft, you can remove it through the fan opening… now remove the control shaft (white)by lightly prying from the outside of the box… now simply install the new door with the same motion (reversed) and the shaft receiver in the down position, you should be able to slide it right into place and insert the shaft. Now ensure that the door is closed towards the firewall and reinstall the actuator. Reinstall the fan and test it, if it’s working properly, reinstall the glove box and door jamb and your done.

  57. dennisb - Auto Tool Sales :

    Date: July 23, 2012 @ 6:24 am

    Ken, thanks for telling everyone how you did this job. It’s good to know it’s possible without pulling the dash out. I’m not that limber and I like to see what I’m working on, so I may still opt to swing the dash. But really good info. Thanks.

  58. Alan :

    Date: July 24, 2012 @ 9:54 pm

    As many of the other readers my 03 Ram 1500 is blowing cold on drivers side and warm on passenger side. It also only blows out of the dash vents, does not switch to dash or floor. The actuator motors are turning. The A/C system is functioning correctly, since I just recently had the condensor and compressor replaced. Based this article I know my recirculating door is probably broken, but does that also have to do with the dash and floor vent too?

  59. dennisb - Auto Tool Sales :

    Date: July 25, 2012 @ 6:28 am

    Alan, not being able to switch from dash vents to floor and defrost has to do with the “mode” door or “mode” actuator not the recirculate door/actuator. I also suspect that the refrigerant level is slightly under-charged since there’s a difference from side to side temperature. Good Luck.

  60. George Lopez :

    Date: July 26, 2012 @ 11:49 am

    I’ve loosened up all bolts and the dash still strongly attached. Can someone help

  61. dennisb - Auto Tool Sales :

    Date: July 26, 2012 @ 12:09 pm

    George, I would double check all the “x” locations marked in the image. There may also be another bolt or two that’s exposed once the steering column is dropped (under the speed-o cluster). I would slightly tug on the dash to help determine at what point there’s still a fastener. It’s been several years since I’ve done a job like this and I really didn’t intend this to be a complete instructional guide for a DIY’er. It may be necessary to refer to a repair manual for more info. We have information on how to subscribe to on-line repair manual access for your vehicle on our repair manual page linked at the top of the page. Good Luck.

  62. George Lopez :

    Date: July 28, 2012 @ 12:01 pm

    Thanks much

  63. jim :

    Date: July 29, 2012 @ 12:48 am

    Thanks for the help low air flow on my 2006 3500 Dodge I will be fixing it first thing tomorrow.Iwill let you know how it goes

  64. Mike S :

    Date: July 29, 2012 @ 9:51 am

    I took the blower motor out and yes the door was laying there!! From the blower motor Point of View what position does the door need to be in for MAX AC??? I was thinking of using Gorrilla tape to secure it in place until the winter when I’ll do the permanant fix. Thanks!!

  65. Ben B :

    Date: July 29, 2012 @ 10:43 am

    I first took the glove box out, pops out very easily and now I can see where the door goes. Then I dropped the blower and reached up in there and instead of breaking it up I put it back in place where it would be for the max air setting and taped it in place with Gorilla tape. Will let you know if any problems come about but I think this will work for me in South Louisiana as all we use is max ac anyways.

  66. john :

    Date: August 21, 2012 @ 1:24 pm

    I have a 2010 dodge ram 1500. It makes a knocking noise when starting up and air only comes out of the floor vents. What can I do to correct this problem?

  67. dennisb - Auto Tool Sales :

    Date: August 21, 2012 @ 1:51 pm

    John, most likely just an actuator. I would find the actuator making the noise and replace it.

  68. john :

    Date: August 21, 2012 @ 2:19 pm

    How do I get to the actuator to replace? What do I have to remove to get to the part that needs replacing?

  69. dennisb - Auto Tool Sales :

    Date: August 21, 2012 @ 2:26 pm

    John, there are several. Some are harder to get to than others. I would listen for the sound and try to see it with removing only as much as needed. Best case scenario is accessing without removing more than just the glove box or some simple trim pieces. Worst case scenario would be removing the dash and HVAC case to access an actuator on the backside of the case. Good Luck.

  70. Mark :

    Date: August 27, 2012 @ 7:26 pm

    My issue sounds similar to this one. The fan sounds like it is in max a/c mode, but very little air is being moved. Also the air control knob does not make any changes to where the air is coming from. There are no nosies coming from the dash that would indicate that anything is moving or even trying to.

  71. dennisb - Auto Tool Sales :

    Date: August 27, 2012 @ 7:29 pm

    Mark, I would look to see if the door is broken. Good Luck.

  72. Guy :

    Date: September 13, 2012 @ 4:07 pm

    Hello, I have a 2003 dodge 2500, the ac is not blowing out the vent as hard as it should. I check that door behind the glove box, it is not broken, and opens and shut when you move the knobs. I took the fan motor out and tested it, it seems to be working fine. I’m scratching my head on this one please help.

  73. Donna :

    Date: October 8, 2012 @ 6:14 pm

    Hi Dennis,
    I recently purchased a 2003 Dodge Ram 1500 and noticed that the 3rd speed on control knob was not working. So I purchased a blower motor resistor. I installed it; pulled the blower motor and the ‘door’ was laying there. I now have all speeds working on the control knob, BUT I think there should be more air/heat coming from the vents. What do you suggest? Please help.

  74. dennisb - Auto Tool Sales :

    Date: October 8, 2012 @ 8:02 pm

    Donna, I would suggest installing the replacement door linked in the article above. It can be installed without removing the dash, saving a ton of labor. Good Luck.

  75. Paul :

    Date: October 13, 2012 @ 8:25 am

    I have a 2001 Dodge Ram and the air and heat work great unless under hard acceleration or going up inclines where the truck is having to accelerate to maintain speed . At this time you can hear the blower motor working like it should but no air coming out of the vents . Once acceleration levels back out you can hear like a pop behind the vicinity of the instrument cluster and air will resume out of the vents . Any suggestions ? Thanks !

  76. dennisb - Auto Tool Sales :

    Date: October 13, 2012 @ 8:29 am

    Paul, I would check for vacuum leaks or a bad one way check valve in the vacuum line. Good Luck.

  77. Paul :

    Date: October 15, 2012 @ 7:03 pm

    I replaced both one way check valves and the vacuum lines are plastic and black in color . I have looked over the lines and can’t see a break anywhere . What would you suggest to help possibly find a hole or crack in the line ?

  78. dennisb - Auto Tool Sales :

    Date: October 15, 2012 @ 7:08 pm

    Paul, I’ve used a hand vacuum pump before to help isolate the leak. Also used a smoke machine. Good Luck.

  79. Paul :

    Date: October 16, 2012 @ 7:53 pm

    Borrowed a hand vacuum pump and found several cracks on different plactic lines . would it be possible to replace all plastic with rubber line and be better in the long run . If so what size ?

  80. dennisb - Auto Tool Sales :

    Date: October 17, 2012 @ 6:19 am

    Paul, I have used rubber lines before to slide over the existing plastic lines to repair sections. I would take a piece of the old one to the parts store to find the correct fit. Good Luck.

  81. Paul :

    Date: October 26, 2012 @ 9:41 pm

    I replaced all plastic lines with rubber vacuum lines and problem with vents still there but not as bad . I have ordered a vacuum canister to put in line to see if that will completely fix the problem . These dodges like to be a challenge .

  82. dennisb - Auto Tool Sales :

    Date: October 27, 2012 @ 8:01 am

    Paul there could also be a check valve that causes the same problem. It allows flow only in one direction and may be in-line somewhere. Good Luck.

  83. Paul :

    Date: October 30, 2012 @ 1:39 pm

    After replacing all plastic vacuum lines with good rubber vacuum lines and replacing both check valves, (dealer only cost 5.32 a piece with tax in Arkansas ) problem was almost non existent . Still wanting to default to defrost vents under hard pull so bought a vacuum canister from auto parts store and installed in line and I can proudly say problem solved . Want to thank Dennis for great help and great website to learn from others what type problems they have and solutions !!

  84. Paul :

    Date: October 31, 2012 @ 4:44 pm

    Worked good for couple of days . Have another problem now . No matter where I put selector air only comes out of defrost . If I put it on max ac it comes out max ac only on defrost . If I turn it to come out on the floor only it still comes out of defrost vents only. Help !

  85. dennisb - Auto Tool Sales :

    Date: October 31, 2012 @ 5:12 pm

    Paul, something has changed. I would recheck for vacuum leaks. A line could have came loose. Good Luck.

  86. Paul :

    Date: November 2, 2012 @ 3:49 pm

    Had put all new vacuum lines on but finally found one that had a small split in it . Replaced and working great .

  87. dennisb - Auto Tool Sales :

    Date: November 2, 2012 @ 3:53 pm

    Now, enjoy your weekend!

  88. Bev :

    Date: November 29, 2012 @ 10:28 am

    Same problem with the ac in our 2003 Dodge Ram 1500 with the vents. We live in the northeast and the same thing is happening with the heat. Some air from vents, it’s hot and it sounds like it should be blowing full blast. Could the fresh air door be the reason for both of these problems. Thanks

  89. dennisb - Auto Tool Sales :

    Date: November 29, 2012 @ 11:14 am

    Bev, sounds like the fresh air door. Let me know if there are any questions on the improved one that we sell. Good Luck.

  90. Mark :

    Date: December 1, 2012 @ 2:32 pm

    Dennis, My 2003 ram has a blend air problem. The drivers side is not as hot as the passenger side.

  91. Mark :

    Date: December 1, 2012 @ 2:33 pm

    The temperature does change, but nearly as much.

  92. Mark :

    Date: December 1, 2012 @ 2:34 pm

    The blend door joint to the servo is fine and stops are fine.

  93. Mark :

    Date: December 1, 2012 @ 2:36 pm

    I’ve cut a hole on the HVAC house to see the blend door closest to the cabin operate. It seems to be working fine.

  94. Mark :

    Date: December 1, 2012 @ 2:40 pm

    Also, the passenger side will not be as cold as the driver’s side when the A/C is on. The A/C evaporator and heater core were replaced about 15 months ago because the evaporator had a bad leak. Now I’m thinking it’s not a blend door problem. Both the rear and forward doors are moving fine. I’m at a loss for the differential in temp on both A/C and heat. Should I consider reverse flushing my heater core?

  95. dennisb - Auto Tool Sales :

    Date: December 1, 2012 @ 3:01 pm

    Mark there will normally be a slight temp difference the further away from the heater/evaporator cores. If the heater core is partially clogged then, flushing it may help. Good Luck

  96. Art :

    Date: December 1, 2012 @ 3:41 pm

    I am wondering if for safety, should you unhook the negative battery terminal so the passenger air bag will not be set off?

    Thanks for your advice,

  97. dennisb - Auto Tool Sales :

    Date: December 1, 2012 @ 6:00 pm

    Art, yes although I know many techs that never worry about it, it would advisable to follow the manufacturers instructions in the repair manual.

  98. Rick Nelson :

    Date: December 1, 2012 @ 6:56 pm

    I have a 04 ram 3500. No matter where the selector is placed I have outside air noise coming in. What part is broken in my heater. It doesn’t sound bad till about 20 mph.

  99. dennisb - Auto Tool Sales :

    Date: December 1, 2012 @ 7:59 pm

    Rick, sounds like the fresh air door like in the article. Good Luck.

  100. Mark :

    Date: December 2, 2012 @ 1:36 pm

    Would agree that the blend door is fine based on what I wrote?

  101. dennisb - Auto Tool Sales :

    Date: December 3, 2012 @ 7:16 am

    Mark, if the blend door was broken there would be more than just a slight temp difference side to side. There would be no control (adjustment) at all. Good Luck.

  102. Art :

    Date: December 3, 2012 @ 1:46 pm

    Art here again. I was able to remove the blender door by reaching up through the hole after removing the fan. I have great heat now! My wife is Bev. She glued the broken piece of the door back on. I tried to reinstall the door. I could not remove the actuator pin.
    How do you remove the rod pin that holds the left side of the door?

  103. marilynn :

    Date: December 5, 2012 @ 9:02 pm

    As I was waiting for my defroster to work it seem like my windows were getting worst it was almost like my windshield was wet the more I wipe off the worst it got I almost didn’t get home from church..i have a 2006 doge ram am on S.S. and I was wondering if I being a senior lady will I be able to fix this problem. I also noticed I don’t have much heat either.

  104. dennisb - Auto Tool Sales :

    Date: December 6, 2012 @ 12:24 pm

    Marilynn, since there seems to be several problems, you may be best served by having a local shop check it out. Good Luck.

  105. Brian M. :

    Date: December 13, 2012 @ 1:34 pm

    I have a 2005 Ram. When the vent is set to the floor position, air still blows out the defrost vents. And sometimes it won’t switch between vents. Is this a vacuum issue?

  106. dennisb - Auto Tool Sales :

    Date: December 13, 2012 @ 2:42 pm

    Brian, sounds like it could be a vacuum line or control issue. If it was a vacuum leak that leaked ALL the time, it would always default to defrost. Good Luck.

  107. Clair :

    Date: December 25, 2012 @ 9:06 am

    I have to replace the recirc door (which fell out two years ago) and the mode two door (which controls floor or defrost). I have the truck in the garage right now with the steering column on the floor and all the bolts I can find to pull the dash back are out but the dash doesn’t want to budge. I took out three on the drivers side, three on the passenger side and two on the floor in the middle, am I missing any?

  108. dennisb - Auto Tool Sales :

    Date: December 25, 2012 @ 9:13 am

    What about on top of the dash underneath the large trim panel. There may also be one around the area of the steering column.

  109. Derek :

    Date: December 29, 2012 @ 12:29 pm

    I have the same issue with weak air flow as Guy mentioned above with my 2003 Ram. I pulled all the front panels off, checked the recirc flap, fan motor strenth, and the other two flaps that work in sync by a rod. My air gets cold and warm, and I can hear the dash humming from the fan motor, but the output is bad. Any idea where to look next?

  110. dennisb - Auto Tool Sales :

    Date: December 29, 2012 @ 12:45 pm

    Derek, the most common cause is a broken recirculate door above the blower. The blower may also be full of leaves. I would make sure the door works and maybe pull the blower out and clean it. Good Luck.

  111. joe :

    Date: January 7, 2013 @ 5:08 pm

    I have a 2010 dodge 3500 diesel that has a knocking sound when you start it in the dash. The air will only blow out at the feet.the air flow nob will not change the direction of the air flow. Any help? Thanks

  112. joe :

    Date: January 7, 2013 @ 5:11 pm

    Well I just read the other guys post. Guess I need to take dash out?

  113. dennisb - Auto Tool Sales :

    Date: January 7, 2013 @ 7:04 pm

    Joe, sounds like a bad actuator. Some are hard to get to. Listen for it and see if you can trace the noise. Good Luck.

  114. Marc :

    Date: January 8, 2013 @ 2:38 pm

    Access to Mode 1 and Mode 2 doors, removing the dash as shown in the picture, are these doors as easily accessed as the Re-circ door?

  115. dennisb - Auto Tool Sales :

    Date: January 8, 2013 @ 2:47 pm

    Marc, no if I remember correctly the case needs to come out and taken apart. Good Luck.

  116. Divine :

    Date: January 31, 2013 @ 6:50 am

    My brother thank God for this site. Please my 2001 Ram 3500 Bus ac cools in the back cabin but takes over 15min for the front cabin to cool…please am so confused on this. What could be the problem?

  117. dennisb - Auto Tool Sales :

    Date: January 31, 2013 @ 7:00 am

    Divine, sounds like the front expansion valve could be going bad. See our article on AC Gauge Readings Explained for more information.

  118. Ricky :

    Date: January 31, 2013 @ 9:53 pm

    Low air flow from vents. I checked the door and it is working properly and not broken. Air moves to the correct vents when dial is moved. Where to check from here?Fan is fine also. Temperature is fine also on heat and cool.

  119. dennisb - Auto Tool Sales :

    Date: February 1, 2013 @ 6:25 am

    Ricky, I would probably pull the blower motor to access the evaporator to see if it is blocked by pollen and leaves etc. Note that there’s no cabin air filter for the Ram. Good Luck.

  120. scott :

    Date: February 7, 2013 @ 6:52 am

    re; ricky my ram van had poor airflow for 2 years i thought it was something mechanical .turned out it was evaporater was blocked up with dust and derbis sucked up through air return in cab took me 15 minutes to fix and saved 100s from would be exspensive mechanics , dennis is right on this one

  121. Rick :

    Date: February 25, 2013 @ 1:48 pm

    Dennis, I removed the broken recirculate door last Summer which obviously increased the air flow and it gets pretty cold, but being a quad cab, it takes all it’s got with vents pointing at me on the real hot 95 + degree days. As you said earlier, it’s having to cool the hot outside air. I’m wondering if I somehow completely blocked the outside/fresh air return which is accessible with the blower motor dropped, would this be the equivalent of Max AC whereas the only available air for the blower would be inside cab air? Also would this cause any problems as far as condensation or perhaps a “moldy” smell since there is no longer fresh air available?

  122. dennisb - Auto Tool Sales :

    Date: February 25, 2013 @ 2:27 pm

    Rick, you could rig it to make it recirculate all the time. Varying from the original design could cause some unwanted consequences though. I wouldn’t worry about mold but it is nice to get some fresh air in the cab sometimes. I would just use the kit, that way you can have it functioning as designed and best of all the dash can stay in. Good Luck.

  123. Jason Ram :

    Date: May 26, 2013 @ 2:42 am

    I have a 2010 Dodge Ram 2500. I get cool air out of the passenger side, but it doesn’t blow very hard. I checked the Recirculate door, and there is no blockage or broken door. At one point, you could hear the fan blowing hard, but little air was coming out of the vents. Suddenly pieces of foam blew out of the vents, and I got some air flow again. This is a double cab with ac vents to the back seat from the center console. I get very little flow to those vents as well. I get no clicking noice from behind the panel as described in other posts.

  124. bc :

    Date: May 27, 2013 @ 11:49 am

    Found a problem with air flow from 2003 ram pu. After in the shop dealer found nothing other than replacing a 50 dollar part and 450 dollars later, still had no air flow thru vents. Found condensing coil completley packed with dirt and a 5 dollar can of coil cleaner fixed the problem. Why don’t the enginners provide air filtration to prevent this from occuring. BC

  125. Torev2 :

    Date: June 16, 2013 @ 12:56 pm

    I have a 2008 ram 1500,the blower works great ( took it out and turned it through all settings) the recirc door operates fine, the blend doors both move just fine, however I am getting little air flow out of the vents. Any Ideas?

  126. dennisb - Auto Tool Sales :

    Date: June 17, 2013 @ 12:29 pm

    Possibly leaves inside case blocking airflow. I would remove the blower and see. Good Luck

  127. Leugers27 :

    Date: June 17, 2013 @ 9:16 pm

    I have an 03 dodge cummins quad cab 2500 and I have great ac when I get in my truck but then after a while I have very low air coming out of the vents even when on high. I can here the blower blowing hard just like a door has closed but I have taken half my dash apart and the fresh air door behind the glove box is fine and in working order. I can’t get air out of the floor vents or even defrost when this happens. Had a dealership look at this last year and found nothing wrong but they recharged the ac anyway. It has a good charge. Any help would be great!

  128. dennisb - Auto Tool Sales :

    Date: June 18, 2013 @ 9:15 am

    Sounds like an intermittent problem. If it is not acting up when the dealer is looking at it and there are no fault codes it would be impossible for anyone to identify the issue. Take the vehicle to the dealer when you can demonstrate whats going on. Show the tech personally. They have to know exactly what the problem is and experience it before they can take the problem seriously and diagnose it properly. Could be a BUS communications issue. Good Luck.

  129. Kfostersmith :

    Date: June 18, 2013 @ 8:14 pm

    Had low air flow for the pass 4 years but living on the coast a just put up with it. Had a hot day so I looked up a fix. George’s idea sounded good. Took about 5 minute and now if works great. If I ever move to the heat ill look into the right fix. Thanks for great website and help.

  130. bucsupward :

    Date: June 19, 2013 @ 8:57 pm

    I have a 2008 Ram 1500 SLT quad 4.7 that with the ac on blows cold air out of the defrost and the floor heater vents. When you start the truck it thumps 3 times then about 20 seconds later it thumps again for three or four times. This sound come from behind the ac controls & the beverage holder under the ac controls. The heater works fine and it comes out of the vents it is supposed to. Also both ac control recalls have been installed by the dealership , but I have been told that this problem doesn’t involve those recalls. The dealership has quoted me $800-1200 TO FIX THE PROBLEM. Help please

  131. dennisb - Auto Tool Sales :

    Date: June 20, 2013 @ 7:29 am

    Sounds like a bad actuator that moves one of the doors in the evaporator case. The dealer’s quote should have included the part that they have diagnosed as failing. The alternative is taking the dash apart yourself and replacing the failed part which is not what I consider a DIY project. Unlike the recirculate door which is much less involved of a project because it is easier to access compared to the doors and actuators in the middle of the dash. Good Luck.

  132. Johnny :

    Date: June 21, 2013 @ 1:38 pm

    I have a 2010 Dodge Ram and when I turn on the power, not necessarily the ignition I get a clicking noise in my dash, right behind my stereo it seems. When I put on the vent, AC or Heat I get nothing from the dash vents, but everything works properly from the floor vents. Need some help here please.

  133. dennisb - Auto Tool Sales :

    Date: June 21, 2013 @ 2:42 pm

    Johnny unless it does what you’ve described when the vehicle is running also I wouldn’t be concerned. If does click when started and running and the air comes out the bottom vents, most likely there is a bad actuator. Some are hard to get to, so the dash may need to be pulled to access. Good Luck.

  134. twinhorses :

    Date: June 26, 2013 @ 12:32 pm

    I have a 2001 dodge diesel the ac works but it leaks water to the left side of blower motor what would cause this its not antifreeze

  135. dennisb - Auto Tool Sales :

    Date: June 26, 2013 @ 12:34 pm

    The most common cause is a clogged drain. See our article on AC Water Leaking Inside.

  136. mickey b :

    Date: July 19, 2013 @ 6:59 pm

    I have a 2001 Dodge Ram 1500 that the A/C cuts out when i slow down and also cuts out when accelerating uphill…..i will check the lines coming out of the firewall passenger side that has been mentioned in previous questions…any help would be great

  137. dennisb - Auto Tool Sales :

    Date: July 20, 2013 @ 9:03 am

    Mickey I would check the gauge readings and go from there. And just so you know, at WOT (Wide Open Throttle) it is normal for the AC to cut off. I explained to my son a couple of years ago when he owned a a Chevy S-10 with a 4 cylinder with an automatic transmission (which was quite a dog when it came to power and acceleration). He said “oh it’s normal then, for the AC to be off the entire time I’m on the Interstate”. Good Luck.

  138. Superdave :

    Date: July 21, 2013 @ 8:30 pm

    Additional help on broken air door. Just removing the broken door will allow hot outside air to enter the fan suction 24/7. I suggest removing the blower motor then propping the door up to block the outside air duct. It is the hole that faces toward the front that has screen covering the hole. Just put the door back to close off that side then jam a piece of wood around 6 inches long up to keep it shut. I used some silicone sealant to hold the prop in place. This way you recirculate your air at all times which really is a good thing. If you need some fresh outside air crack the window.

  139. dennisb - Auto Tool Sales :

    Date: July 22, 2013 @ 9:16 am

    Dave, thanks for the suggestions. I like the door we sell, because it can be done in about the same amount of time as a temporary fix. It also keeps the system functioning as it was designed. Here’s a couple of other considerations.

    1. When first getting into the vehicle, the outside air is cooler than the inside air. The AC works faster using the cooler air when first turned on. Then the MAX or recirculate mode can be used.
    2. When the vehicle is parked in the hot sun, having the fresh air vent open acts as a pressure relief for expanding hot air. Although it’s not common, I’ve seen windshields crack in Florida the hot sun because of excessive pressure build up. This is a consideration for those of us that live in hot climates.

  140. chris a :

    Date: July 31, 2013 @ 11:54 am

    I have a 2004 dodge ram and the re-circ
    door is broke, I can get my hand in there and it is flat, I can pull it to 90 degrees and there is nothing holding it. What I need to know is how to get the glove box compartment out and as far as anything else, is there more things on the dash that has to be removed? Thank you, Chris

  141. dennisb - Auto Tool Sales :

    Date: July 31, 2013 @ 12:52 pm

    Hey Chris, the good news is that the dash does NOT have to come out for this repair now, Click the image below to see the door that has an updated design and can be installed in the vehicle.

  142. Will :

    Date: August 8, 2013 @ 10:51 am

    How did you remove the bolt or rivet on the drivers side of the dash next to the door jam? It is the second fastener down on your first picture and is a steel color, not the black bolts. Just curious if this needs to be removed or if there is a trick. It’s the only thing holding me up from getting my dash out completely.

  143. dennisb - Auto Tool Sales :

    Date: August 8, 2013 @ 11:04 am

    Will was several years ago, but if I remember correctly that is just a line up pin that goes into a hole (that shouldn’t be holding the dash). I think the passenger side has a metal extension that requires lifting up on the dash a little to clear it. Unless doing other work, it’s much better to use the kit we sell that eliminates pulling the entire dash. Good Luck.

  144. terence :

    Date: August 8, 2013 @ 7:35 pm

    If it’s not the door that is an issue on my truck what could it be? I have a 2006 dodge ram 3500 Cummings. I checked the door that’s normally the common problem and it wasn’t that. What else could be the issue on why its not blowing out the front vents. It does blow hard out of the rear floor vents. What else could be wrong? Thank you.

  145. dennisb - Auto Tool Sales :

    Date: August 9, 2013 @ 8:00 am

    Terence, you are having a separate issue altogether. It could be the control head or an actuator most likely. Good Luck.

  146. terence :

    Date: August 9, 2013 @ 12:52 pm

    what do you mean the control head or the actuator?

    thanks again

  147. dennisb - Auto Tool Sales :

    Date: August 9, 2013 @ 1:12 pm

    The control head is where you change the temp, mode etc. The actuator is the little motor that actually moves the HVAC doors changing the direction of the airflow.

  148. terence :

    Date: August 9, 2013 @ 5:49 pm

    the hvac door is the one behind the glove box. thats not broken and works fine. all the temperature changes fine from hot to cold. it just doesnt blow hard out of the front vents

  149. dennisb - Auto Tool Sales :

    Date: August 9, 2013 @ 5:50 pm

    There’s more than one HVAC door…

  150. terence :

    Date: August 9, 2013 @ 6:37 pm

    where would that hvac door be

  151. dennisb - Auto Tool Sales :

    Date: August 10, 2013 @ 3:39 pm

    Typically there are three doors in the HVAC case. Fresh air, blend and mode. If a system has dual (split zone) there will be a fourth. The easiest one to get to which can be done without a major job, is the fresh air door which is what the article is about. We don’t sell any of the other doors because they they don’t fail as often and they are not what I consider a “do-it yourself” job. The door we sell for the fresh air door replacement is a do-it-yourself type repair that has saved our readers a lot of money while improving the design and strength.

  152. Wise Auto Tool Blog » Car Heater Not Working? Troubleshooting, How to Fix Repair Tips :

    Date: September 30, 2013 @ 10:29 am

    […] is common, resulting from broken doors that can cause one side to work but not the other. The Dodge Ram truck fresh air door problem, is a broken door issue primarily with their fresh air door that can prevent airflow from […]

  153. James :

    Date: November 3, 2013 @ 11:49 pm

    Just had blend and all actuators replaced on my 2006 mega cab diesel and I still have the problem of air blows harder on driver side than the passenger side any ideas????

  154. dennisb - Auto Tool Sales :

    Date: November 4, 2013 @ 7:07 am

    James, it could be a control head issue or an air duct with a leak… It would have been obvious if the door was broken so the shop would have been able to tell you if the door was the problem or not. Also, the repair shop can check to see if there’s any codes stored for the HVAC system which may lead to the problem. Could also just be something blocking the duct work. Good Luck

  155. James :

    Date: November 6, 2013 @ 7:47 am

    I took it back to the dealer and they pulled it back apart again they said there is a screen in the duct system that was clogged from old material off of old blend door, they found a service letter on it and removed the screen according to service letter and problem is fixed air blows hard on both sides now

  156. Phil :

    Date: December 24, 2013 @ 10:48 am

    Have a dodge 2500 bighorn diesel. Am getting heat out of passenger side and cold out of drivers side with heater on. Can you give me any suggestions on what to check

  157. dennisb - Auto Tool Sales :

    Date: December 24, 2013 @ 12:51 pm

    Most likely a broken blend door- read below for more on the doors.

    Typically there are three doors in the HVAC case. Fresh air, blend and mode. If a system has dual (split zone) there will be a fourth. The easiest one to get to which can be done without a major job, is the fresh air door which is what the article is about. We don’t sell any of the other doors because they they don’t fail as often and they are not what I consider a “do-it yourself” job. The door we sell for the fresh air door replacement is a do-it-yourself type repair that has saved our readers a lot of money while improving the design and strength.

  158. Phil :

    Date: December 24, 2013 @ 2:03 pm

    Thank you, I will start with that

  159. Josj :

    Date: January 30, 2014 @ 3:20 pm

    I have a 2002 Dodge Ram 1500 Quad Cab and the heat and A/C work fine and the air is circulating properly. My issue is that I can only get heat on max settings and on non-max settings the air is cold. Can the recirculating door cause this problem or is a blend door or mode door 1/2 issue?

  160. dennisb - Auto Tool Sales :

    Date: January 30, 2014 @ 3:36 pm

    It could be normal if the ambient (outside) temperature is extremely cold. Think about what the MAX (recirculate) is doing. When it’s on recirculate the system is heating the air that is circulating in just the cab. If it is not on recirculate, the system has to heat the outside air that is entering. Not a big deal unless it’s near or below freezing outside. Good Luck.

  161. jeff :

    Date: February 9, 2014 @ 12:57 pm

    2006 Dodge Ram 2500. The defrost blows cold while the floor blows hot air.

  162. dennisb - Auto Tool Sales :

    Date: February 9, 2014 @ 3:52 pm

    Not related to the recirculate door.

  163. jeff :

    Date: February 9, 2014 @ 3:54 pm

    Any ideas

  164. dennisb - Auto Tool Sales :

    Date: February 9, 2014 @ 4:10 pm

    I would rule out the recirculate door and look at the other doors…

  165. GTW :

    Date: February 9, 2014 @ 4:22 pm

    06 Dodge Ram 3500 QC,SB,Sat, Jake, Etc.
    Just after my warranty expired my hvac fan started making a horrible noise. At that time of year I needed my defroster so just ran it on low until I could dig into it. I was thinking that a pencil or something had fallen down the defrost vent What I didn’t realize was that the fresh air door had broke and fallen against the fan causing a load on the motor and it burned out the overload relay and that left me with only the highest fan setting. (safety feature) I bought a new relay, installed it, (super easy) and pulled the motor/fan out. I used 2 hacksaw blades pushed the door back in place and wedged the blades up against the door to hold it. Been working for 6 years now with no problems. The dealer wanted 850.00 to fix.

  166. L.T. :

    Date: February 20, 2014 @ 2:51 pm

    Having issue with poor air flow from vents in 06 Dodge 2500. Pulled blower motor and recirc. door was not broken but once I grabbed it to check it’s operation it broke. I removed then the broken door and re-installed the motor and still have poor air flow. Noticed when truck is idling that the blower motor speed occasionally increases then decreases rapidly. When selecting floor vent it seems to have decent air flow but poor out of the dash and defrost vents. The truck is used in farming conditions which consist of lots of dust so I’m starting to think the plenum box is full of mud/dirt? Also the surging of the blower motor speed is throwing me off a bit too. Any ideas?

  167. dennisb - Auto Tool Sales :

    Date: February 20, 2014 @ 6:41 pm

    A little fluctuation in the blower speed is normal due to the varying demands on the electrical system; like when the AC compressor cycles on or off or other demands change for whatever reason. Many of today’s cars have cabin air filters but I don’t believe your truck has one. That means that the dirt and pollen could have been collecting on your evaporator core and could be restricting air-flow. Maybe you can remove the blower motor and access the evaporator. I know on some models you can get a peak that way. If you can see it and confirm there’s a lot of dirt collected on the fins you may be able to clean the evaporator. I’d use a garden hose being careful not to get anything electrical wet and recheck. We sell the recirculate door which is made of steel instead of the factory plastic. Having the door will always help when on recirculate mode. Good Luck.

  168. bobp :

    Date: March 11, 2014 @ 12:12 am

    I have the dash out as explained and found bad recirc and bad mode 2 door. Unfortunately, I took much more apart before finding your post. I have so much I cant tell what position I left the HVAC controls in. I am going to replace 2 doors and need to know: do the actuators self-calibrate? I hate to put everything back and have the door orientation wrong and snap the plastic coupler or door.

  169. dennisb - Auto Tool Sales :

    Date: March 11, 2014 @ 6:37 am

    Bob, yes they self calibrate. Good Luck.

  170. geronb73 :

    Date: April 11, 2014 @ 4:08 pm

    Thanks for your post. I’ve been wondering why my air flow doesn’t blow well will check blower motor location when I get off for trap door…

    thanks Geronb73

  171. donchilito :

    Date: April 13, 2014 @ 6:26 am

    Any info on changing out the recirculation door on the 09 1500 crew cab? Can it be done by removing the blower motor as well? Thx

  172. dennisb - Auto Tool Sales :

    Date: April 13, 2014 @ 8:28 am

    The door kit that we sell is for 2002-2008. You may be able to remove the door through accessing the hole behind the blower motor but that’s not a real fix. You will no longer have MAX capability which removes much more of the moisture in the passenger compartment and allows more efficient heating and cooling. Good Luck.

  173. steve :

    Date: April 23, 2014 @ 3:36 pm

    I have a 1999 dodge and i am also getting little air and alot of noise even after putting a new blower motor in my truck. i am going to be replacing the dash and will have alot tore down so i am going to look into the door issue. do you sell parts for a 1999 dodge 2500? thank you for your time

  174. dennisb - Auto Tool Sales :

    Date: April 23, 2014 @ 4:43 pm

    Steve, sorry we only sell the one recirculate door for the 2002-2008 Dodge Ram. Good Luck.

  175. jimmycrackcorn :

    Date: May 31, 2014 @ 7:00 pm

    Hello Dennis.. Great writeup. Its exactly what I was looking for! However, I am in a some what different predicament. I need to replace the heater core & on top of that the lower housing of the hvac box, it’s clearly broken with some sort of plastic sheet welded/siliconed on. Model is a 07 2500 ST single cab 6 speed The scumbag dealer passed this problem along to me & are 2000mi away so I can’t really bring it back. I can’t seem to find any info on the lower box replacement or even a aftermarket part #. Do you know where I could find one?
    Take care,

  176. dennisb - Auto Tool Sales :

    Date: May 31, 2014 @ 7:28 pm

    Hey Jimmy, sounds like dealer only parts. May a salvage yard? Good Luck.

  177. americanhotrod :

    Date: June 3, 2014 @ 5:14 pm

    I was fascinated to find this blog. Great info. I have a 2006 Dodge 1500 Mega-Cab and it recently started blowing warmer air on the passengers side than the drivers side. Once really moving, the drivers side is 42 degrees and the passengers is 62 degrees. driving around start and stop is 62 degrees and 82 degrees respectively. It seems like standing still the passengers side starts to cool better getting hotter under acceleration. I assumed actuator problem caused by a vacuum issue were the actuator won’t hold under less vacuum. Reading this, I’m wondering about need for Freon. What do you think?

  178. dennisb - Auto Tool Sales :

    Date: June 3, 2014 @ 5:22 pm

    I’d always check the refrigerant charge first. Good Luck.

  179. jimmycrackcorn :

    Date: June 7, 2014 @ 6:14 pm

    That’s what I was thinking, dealer only or junk yard. I’ve called around to a few “truck yards” but they all want me to have the part in hand, but that just isn’t do-able. Do you know if there were multiple styles of HVAC boxes for early 07? I know of the dual climate but mine is a single cab. They are making it sound as if there are more than two styles for early 07.

    Also.. I wish I could send a pic for you to reference but here’s is what I’m thinking. I believe there was an accident were the box got smashed on the passenger side. The PO plastic welded something on there but didn’t realize the core got hit too & buttoned it all up with it leaking. The box doesn’t hold any sort of fluid, right? It’s all contained in the core, right? If I could get away with just replacing the core & just deal with the ugliness of the yellow plastic sheet weld I would be functional as the weld was to just hold the heated/cooled air in the box. Does that sound about right?

    Thanks for your help, your doing a good thing here.

  180. dennisb - Auto Tool Sales :

    Date: June 7, 2014 @ 7:22 pm

    As far as the different styles, you would need to check witha dealership that has that information in crash books or diagrams on their computer etc. But, I would probably just replace the core and seal up the case. That’s a s long as all of the modes for changing air direction and air mix function properly. Good Luck.

  181. Paul :

    Date: June 10, 2014 @ 5:55 pm

    I have a 2004 3/4ton dodge ram seem to have water coming out air ducts not anti/freeze as first thought was heater core is there a condensate hose that could be plugged?

  182. dennisb - Auto Tool Sales :

    Date: June 10, 2014 @ 7:10 pm

    Paul, yes. All evaporator cases have a drain the bottom usually that goes through the firewall. Look for any dripping water underneath the truck when the AC is running to help locate the hose. The drain may be completely or just partially clogged. I’d try a metal coat hanger and compressed air to free the clog. In extreme cases like if you park under trees a lot, there could be a lot of leaves in the evaporator case. Sometimes you can remove the blower motor to access and remove the leaves. Other times the entire evaporator case has to come out and taken apart in order to clean it out well. Good luck.

  183. Alexander :

    Date: June 14, 2014 @ 12:21 pm

    I have a 2002 dodge ram 1500 and at the lowest or highest speed I have the ac on it still only blows from the bottom. At any speed the air barely comes out of the front vents. Not sure if I’m having the same problem as everyone else with the broken recirc door.

  184. dennisb - Auto Tool Sales :

    Date: June 15, 2014 @ 4:36 pm

    The easiest way to see if the door is broken is to look behind the glove box and inspect it. The resistor may be faulty causing the blower not to work on all speeds. Good Luck.

  185. MauiKimo :

    Date: June 21, 2014 @ 1:06 am

    you talk about the door failure, but mine works fine until I throttle up the vents close. release the throttle and the vents open again. I know it has to be a vacuum leak, but where would it be, inside the truck or engine compartment. I know the door is not broken, the truck is a 96 1500 with 5.2 liter motor and only 70,000 miles on it. Mahalo

  186. dennisb - Auto Tool Sales :

    Date: June 21, 2014 @ 9:30 am

    This article is not on the older models like your 1996. Your problem does sound like a vacuum leak. Newer vehicles are more likely to have vacuum leaks in the passenger compartment because the heat can cause plastic to harden and break easier and there could be battery acid or other leaks that can damage vacuum lines. Your truck, being 18 years old, could have a vacuum leak anywhere, especially since the plastic can become brittle over time no matter if it’s in the engine compartment or not. I would start by checking in the engine compartment and following the line inside the cab. There could be a break in the line somewhere or there could be a bad diaphram in one of the actuators, causing a vacuum leak, that works a door. The control head could also have a vacuum leak. A visual check is the first step. Using a vacuum pump I’ve been successful finding leaks like that before also. On harder leaks to find I’ve used a smoke machine. The smoke escaping reveals the problem area. Good Luck.

  187. Guy :

    Date: June 21, 2014 @ 1:56 pm

    Hello, I have a 2003 dodge 2500. The air is cold but not blowing hard through the vents even when the blower is on high. I checked the havac door and it works fine. Checked the blend doors seem to be working fine. I can’t figure this one out on my own, please help

  188. dennisb - Auto Tool Sales :

    Date: June 21, 2014 @ 2:29 pm

    Could be leaves blocking the flow. I’d pull the blower and see if there’s excessive leaves or other debris. Good Luck.

  189. Brad :

    Date: June 25, 2014 @ 8:52 pm

    Hello, I have a 06 ram 2500 5.9 with 509,000 miles, where would the vacuum line be located? Air is just blowing out the defrost, also where is the most common place that the a/c leaks from in these trucks?

  190. dennisb - Auto Tool Sales :

    Date: June 26, 2014 @ 8:14 am

    Mostly older systems (2001 and older) use vacuum operated control motors to open and close the evaporator case doors and most newer systems (2002 & up) use electric motors that do not require vacuum. On systems that are vacuum operated, the vacuum line usually goes through the firewall near the heater hoses. It runs from the vacuum cannister to under the hood or behind the bumper cover to the evaporator case and AC control head.

    The most common Freon leak is the evaporator on all Chrysler products, however anything can leak that the refrigerant passes through. Compressor, hoses, condenser, switches etc. That’s why it’s best to use a good refrigerant leak detector (tester) to pinpoint refrigerant leaks. Car air conditioning UV dye is also another method for finding leaks. Good Luck

  191. mike :

    Date: June 28, 2014 @ 2:48 pm

    I have a 2003 dodge durango that the rear ac blows cold but the front blows hot… Any ideas…


  192. dennisb - Auto Tool Sales :

    Date: June 28, 2014 @ 2:59 pm

    Most likely a front expansion valve…

  193. Darren :

    Date: July 1, 2014 @ 11:48 am

    I have a 2003 Ram 1500. When I turn on the a/c the truck starts missing and when I am at idle it gets worse. what do you think causes this? If I run the a/c for over 10 min the truck starts to overheat.

  194. dennisb - Auto Tool Sales :

    Date: July 1, 2014 @ 12:53 pm

    Darren, this is an engine running or drivability issue and an overheat issue not an AC problem. See our articles on misfires and idle and overheating. But I’d pressure test the cooling system and maybe do a carbon test to make sure there’s no exhaust in the cooling system and go from there. Check to see if there’s any codes stored… Good Luck.

  195. larry :

    Date: July 8, 2014 @ 10:34 pm

    2001 dodge ram 2500. replaced Ac fan. now it is not blowing hard at all. door is working when we take off glove compartment. I am stumped

  196. dennisb - Auto Tool Sales :

    Date: July 8, 2014 @ 10:51 pm

    Larry, I once installed a new blower motor and the wires were reversed. It sounded fine but it obviously didn’t blow properly. If it’s not turning fast could just be a defect. I’d make sure it turns easily by hand also. Good Luck.

  197. Vick :

    Date: July 9, 2014 @ 12:13 am

    Hey Dennis I have 2006 ram 1500 just replace the compressor and the fan but on driver side blow cold and passenger blows warm And I have it on high volume and then I have low airflow but I hear the fan blower blowing hard any idea

  198. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 6:47 am

    Vick, a huge difference in side to side temp can be from low refrigerant. A little variance is normal. If it’s a dual zone system, there could be a door issue, but first I’d make sure the charge is correct. See our AC gauge readings explained for help reading the gauges. As far as the air flow volume being low, it’s possible that the wires are reversed on the blower motor since you just installed it. Especially if the airflow was good before the old blower failed. I once installed a new blower motor and the wires were reversed. It sounded fine but it obviously didn’t blow properly. You already know about the possibility of a door issue since you read this article. Good Luck.

  199. JD :

    Date: July 9, 2014 @ 8:20 am

    2001 Dodge Ram 1500 5.2l – Just purchased. AC is *always* on but NO heat. Temp control does nothing when turned from blue to red. All blend doors work fine. Fan switch works in all positions. Where to begin?

    Great blog – Thanks!

  200. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 8:33 am

    I don’t see how the blend door could be functioning properly as you said “All blend doors work fine“. The blend door (or doors, plural if it’s a dual zone system) makes the air entering the case blow across the heater core fins instead of the evaporator core. If the door or doors were moving properly you’d feel the difference. I’d think that this is not occurring due to the actuator or the control head etc., being faulty.

  201. JD :

    Date: July 9, 2014 @ 9:05 am

    WOW -great response time – Thanks & Good Morning. “blend” doors vs. the control that directs air flow to dash, defrost, floor, combo – all those work. My error – the terminology of “doors”. Fortunately, this is one of the RAM 1500’s with a VERY deteriorated dash. I can just pick away the pieces and get in there to see.

  202. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 9:46 am

    Good morning JD. Those dashes do crumble. I’ve changed them before. The mode door (or doors) will change the vents that the air comes out of. Top middle or bottom. The blend controls cold and hot air mix or switching completely back and forth from cold to hot. I’d look for the actuator that moves (or at least should move) when red to blue (cold and hot) know is turned.

  203. JD :

    Date: July 9, 2014 @ 11:38 am

    Cannot get to / see the actuator nor hear/fell anything when going cold to hot. Fresh air door opens completely & smoothly when knob is in OFF position. Have to stop for a couple days (life interferes). I will be back – Thanks again!

  204. JD :

    Date: July 9, 2014 @ 12:37 pm

    Dennis, you’re gonna love this! Wrapping up for the day, went to close the hood, saw something shiny at the firewall next to heater core inlets. Hidden with a rag – NEW hose clamps. In & Out heater hoses connected TOGETHER. Ah! Hah! No coolant in heater core = no heat. Bought used from private party – buyer beware. How did I miss that…? Core most probably bad will have to wait. It’s Summer here in Virginia don’t need no stinking heat.

  205. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 12:44 pm

    That explains no heat. That doesn’t explain why the AC is always on… Oh well another day.

  206. Jason :

    Date: July 9, 2014 @ 4:03 pm

    Dennis, I have a 2011 Dodge Ram 2500 Longhorn Diesel 4×4. have had A/C problems since 15k miles. A/C goes warm, low air flow, Max A/C does not kick in. Truck now has 65k mi and has been into the dealership 4 TIMES. I’m now on this Enhanced Customer Service Program. I’ve been told by an outside A/C mechanic who has knowledge of Dodge, that the entire A/C circulation system was designed improperly. Any advice is appreciated

  207. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 6:08 pm

    Hello Jason, I haven’t seen any major changes in the A/C heater ventilation system in the Dodge Ram in recent years. Looks like 09 to at least 2011 uses the same evaporator case (Dodge calls it a distribution housing). What I have seen is that the size of the condenser seems small to me. The condenser also has the transmission cooler built into it. There could be some heater transfer there.
    The MAX ac problem should be checked easily. The fresh air door has to move to recirculate.
    But, going by the other symptoms that you provided – Starts blowing warm and there’s low airflow. Seems to me like the problem could be the evaporator freezing up. If the evaporator gets too cold, the condensation on the outside of the evaporator can freeze creating a wall of ice that can restrict airflow and prevent the heat and cold exchange in the air that needs to pass through the coils/fins.

    Some Chrysler vehicles have temp probes called thermistors. – On vehicle’s that are equipped with them, the thermistor (temperature probe) is located in the evaporator case. It actually sticks into the evaporator so it can measure the temp there. If they fail or read incorrectly the result can be the compressor runs too much or not enough. If it runs too much the evaporator can freeze causing low airflow and poor cooling. If the system is turned off awhile the ice can melt and allow airflow again when started back up. Then the pattern repeats. The expansion valve can cause the same issue if it’s not controlling the flow of refrigerant correctly. So anyway, when your problem occurs, I’d see if turning the vehicle off for a few minutes and see if it starts cooling again after ice if present has time to melt. Good Luck.

  208. Vick :

    Date: July 9, 2014 @ 6:52 pm

    So I found out that blend door was broken and now there is airflow so Dennis what happens if I don’t replace the door

  209. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 7:37 pm

    You won’t be able to adjust the hot and cold.

  210. Vick :

    Date: July 9, 2014 @ 10:21 pm

    To replace it do I need to take the dash off

  211. dennisb - Auto Tool Sales :

    Date: July 10, 2014 @ 7:18 am

    Most definitely. We only sell the recirculate/max air door because it can be done without removing the dash. The blend door (or plural, doors if dual zone) are much more involved. Good Luck.

  212. Roger :

    Date: July 12, 2014 @ 4:53 pm

    Thanks for the help on this page. It sure helped.

  213. dennisb - Auto Tool Sales :

    Date: July 12, 2014 @ 7:59 pm

    Roger, thanks for the feedback. Check out our other articles here and at Wise Auto Tool Blog as well.

  214. George :

    Date: July 27, 2014 @ 11:03 am

    I have a 2009 Dodge. I started getting a flapping noise from the heater area. It goes away when I select air to the floor instead of the dash. I am not sure of what to check first. Could you have an idea? Thank You. Geo

  215. dennisb - Auto Tool Sales :

    Date: July 27, 2014 @ 6:40 pm

    Most likely a door actuator/motor failing. Follow the noise to the source of the problem. Good Luck.

  216. carl k :

    Date: July 28, 2014 @ 9:30 pm

    I have a 2006 Dodge Dakota V8 slt and I have been having AC issues. This is happened all of a sudden where the dash vents will not blow any air or very little (possible door closed?). The floor vents and the Defrost vents blow cold air when the selector is switched. I was thinking it was either the switch or better yet some door that is not being opened by an unknown electric part. What do you think?

  217. dennisb - Auto Tool Sales :

    Date: July 29, 2014 @ 8:04 am

    I’d check the doors and actuators for movement when changing the modes and max ac/recirculate. On the Ram like covered in this repair article, if the recirculate door breaks and falls it can almost completely obstruct airflow. The Dakota may have a similar issue. Good Luck.

  218. tommy :

    Date: July 29, 2014 @ 9:57 pm

    I just bought a 07 dodge bighorn about two months ago. One day I cranked the truck after cutting the truck off and the air wouldn’t come on. I went several miles down the road and it finally came on. It has done this several times. When it isn’t working u can change the control to heat, defrost, it doesn’t matter, nothing happens. Today was the first day when it didn’t come on, that I made it all the way home without it coming on. If the heat or defrost would still work, I wouldn’t worry about it right now, but will not be long before will need them. Any suggestions?

  219. dennisb - Auto Tool Sales :

    Date: July 30, 2014 @ 7:43 am

    Tommy, I’m a little unclear on what the actual symptom of the problem is. Sounds like no air is blowing since you say nothing works. If there’s no air blowing and you don’t hear the motor, try tapping on the blower motor. If it comes on make plans to change it soon. If you hear the motor but no air is blowing, try checking the recirculate door. Good Luck.

  220. mstanggirl :

    Date: August 1, 2014 @ 11:14 am

    98 dakota V6… not getting much enough heat in the winter… and noticed the selector switch to change airflow from dash to defrost or floor doesn’t seem to be functioning correctly. I moved it 3 positions and it didn’t seem to want to change… gave it a second and it was like the vacuum finally took hold and then it did change the airflow.
    thermostat and water pump have been changed and both hoses to heater core feel close to the same temperature.

  221. dennisb - Auto Tool Sales :

    Date: August 1, 2014 @ 11:24 am

    Sometimes the vacuum operated door motors take a second or two to work. The diaphragm could be sticking a little. As long as it does move the doors I wouldn’t be too concerned. The main problem with the heater not working well is from low coolant. Number two – air trapped in the system. Number three – the core partially stopped up from rust, broken down coolant or Stop Leak that someone somewhere along the line has dumped in the cooling system. I’d guess your heater core is restricting flow some. Maybe try flushing with a garden hose and see. Good Luck.

  222. MikeR :

    Date: August 6, 2014 @ 3:28 pm

    I’ve Read through alot of these, but thought I would ask mine specifially. I am having variant temps from driver to passenger. The ac cools better on lower settings, and then will lose that cool on the max setting. I almost bought some diy canned refrigerant but wanted to look online first. I am going to check the recirculate air door, but wanted to see what else I could do. I hate to spend 40$ on a can if thats not it.

  223. MikeR :

    Date: August 6, 2014 @ 3:49 pm

    Update: recirc door works and is not broken.

  224. MikeR :

    Date: August 6, 2014 @ 4:33 pm

    Hey Dennis, the auto parts guy thinks it is a climate/temp sensor, anythoughts?

  225. dennisb - Auto Tool Sales :

    Date: August 6, 2014 @ 4:57 pm

    Mike, it’s normal for there to be a slight temp difference from side to side, possibly 3-5 degrees or so. If the difference is more than thatcould be low refrigerant or a problem with one of the blend doors (on dual zone systems). I’d take low and high side readings and go from there. Good Luck.

  226. dennisb - Auto Tool Sales :

    Date: August 6, 2014 @ 4:59 pm

    ASk 10 different parts guys and get 10 different answers… OK that may also go for technicians if they haven’t done anything to actually test the vehicle. Talking about it and actually checking pressure readings etc. are two different things. Good Luck.

  227. Kat :

    Date: August 13, 2014 @ 2:45 pm

    I have a 2008 Dodge Ram 1500. When I start the truck and turn on the air it doesn’t always turn on. and then after driving for a bit it turns on. What could be the problem and how would I fix it?

  228. dennisb - Auto Tool Sales :

    Date: August 13, 2014 @ 3:21 pm

    Kat it would be helpful to have more information. But if you’re saying the blower doesn’t blow at all for awhile sometimes, perhaps it’s a blower motor failing. Try tapping on the blower motor when it acts up to see if it comes on. Good Luck.

  229. Cody :

    Date: August 29, 2014 @ 7:30 pm

    Dennis I have a 2010 ram 2500 with a 6.7 on any setting my ac will blow cold then blow warm air for about 5 second then blow cold again this happens all while I’m driving freon levels are good and blower is working correctly evap not freezing any other opinions?


  230. Scott :

    Date: August 30, 2014 @ 3:57 pm

    Dennis, my 2006 dodge 1/2 ton truck has poor circulation out of the vents ( maybe 25% of what it should be). It will not switch to the floor or defroster either when turning the control knob. Is this a mode door problem possibly? Thanks for any info you can help me with.

  231. TexasDrew :

    Date: September 1, 2014 @ 7:16 pm

    I just did this repair but came across your write up only halfway into the job (while trying to remove the dash board). So now I have the OEM replacement installed as described above however add to that: a slight cracked dash (since I tried to remove the plastic part from the metal) and also a harrowing experience where my brakes became stuck in the down position. REMEMBER to work the brakes BEFORE you test drive or they could become stuck. Dennis, great write up only wish I’d found it first and ALSO, there are two additional bolts under the gauges that have to be removed for the dash to come forward. 2002 Dodge Ram 1500 4×4 SLT. Oh please tell me I didn’t sustain damage from driving my truck about 2 miles with the brakes 80% applied.

  232. dennisb - Auto Tool Sales :

    Date: September 2, 2014 @ 8:57 am

    TexasDrew, the brakes could have been overheated and possibly warped the rotors. You’ll know if this occured because you will have a brake pulsation when applying the brakes. Good Luck.

  233. dennisb - Auto Tool Sales :

    Date: September 2, 2014 @ 9:02 am

    Could be a mode door issue or an actuator. I’d remove the actuators and see if manually operating the doors works. Good Luck.

  234. dennisb - Auto Tool Sales :

    Date: September 2, 2014 @ 9:14 am

    Cody, Perhaps a door issue. But you could also note whether the AC compressor is cycled off during the 5 seconds of blowing warm. Good Luck.

  235. TexasDrew :

    Date: September 4, 2014 @ 10:43 pm

    Yep, rotors are just a little warped. A relatively easy fix.

  236. dennisb - Auto Tool Sales :

    Date: September 5, 2014 @ 7:19 am

    Drew, thanks for letting us know how it turned out. You still saved some money even though the rotors are warped. And maybe someone else will benefit from reading this.

  237. Andy :

    Date: September 14, 2014 @ 12:54 pm

    What is the AC kit for dodge called??? Your not really clear, search door kit on your website.

  238. dirtdober :

    Date: September 14, 2014 @ 5:52 pm

    2003 ram 3500 5.9 diesel 4wd air blows out vents fine just will not change to defrost or floor what’s the fix ?

  239. dennisb - Auto Tool Sales :

    Date: September 15, 2014 @ 10:48 am

    I would check the mode actuator. Good Luck.

  240. dennisb - Auto Tool Sales :

    Date: September 15, 2014 @ 10:54 am

    Click the following number AAA9 DLT, for more information on the replacement door kit.

  241. dirtdober :

    Date: September 22, 2014 @ 7:40 pm

    Where is the mode actuator located and how do you check it ?

  242. dennisb - Auto Tool Sales :

    Date: September 23, 2014 @ 7:15 am

    The mode actuator is in the middle (not the one this article is about). I would change the settings from floor, middle vents and defrost and look for actuator movement. The middle actuators are harder to access than the recirculate one that’s on the right side behind the glovebox. Good Luck.

  243. beachcreature :

    Date: September 28, 2014 @ 1:29 pm

    I have an ’08 Ram 1500 (single zone hvac) in which I have very little air flow thru the vents BUT all other aspects of the system work just fine – recirc door is intact and opens/closes normally, blend door seems fine as air can be cold, hot or any combination thereof and mode changes all air flow directions as it should. Tried new blower motor but no change. It used to blow fine. Any ideas???

  244. dennisb - Auto Tool Sales :

    Date: September 29, 2014 @ 7:19 am

    Possibly something blocking the flow within the duct work or a leak. Not common but is a possibility. Good Luck.

  245. brad :

    Date: October 31, 2014 @ 2:49 pm

    98 dakota slt 318 my problem is to find where does fresh air enter cabin from? I had a mouse piss in the duct work and I’m trying to figure out how to sanitize and get rid of smell. I have seen sprays the you spray into duct system but they spray into fresh air system with the blower motor running. I dont have a cabin filter. How do I get spray into duct? Thanks.

  246. dennisb - Auto Tool Sales :

    Date: October 31, 2014 @ 3:33 pm

    Brad, when on MAX or recirculate, the air circles back into the system underneath the passenger side dash. When on fresh air (not Max) the outside air enters the case from around the passenger side cowl area undernaeth the windshield. The sprays are good, but I would remove the blower motor and see if there’s a rat’s nest too. You may be able to clean with a shop vac and a garden hose through that access hole with the blower motor removed. I would use a water and bleach mixture to sanitize. The specific recommendations for diluting bleach may be different depending upon the brand and concentration. So be sure to read the instructions or labels that are posted on the bleach bottle you purchase. Also, everyone knows bleach can fade clothes and carpet etc. so be careful. Good Luck.

  247. angel :

    Date: November 3, 2014 @ 8:32 pm

    I have put everything new on my 2007 dodge ram lone star 5.7 hemi for my ac the clutch was burned so i put a new ac compresor it had a leak in line so i fixed that then the clutch burt up so i got another new compressor. About 2 weeks later it did it again what is wrong with this crazy thing can somebod . Help

  248. dennisb - Auto Tool Sales :

    Date: November 4, 2014 @ 7:31 am

    Angel, the clutch can burn when the AC compressor locks up. The most likely cause of a repeat compressor failure is a contaminated system (metal and debris put into the system from a failed compressor coming apart internally). Proper oiling is also required and turning the compressor shaft about ten time manually to disperse the oil and keep it from damaging the new compressor. The system should be flushed before installing a new compressor. The expansion valve and dryer should be replaced. Also if a system is really badly contaminated an extra in line filter is recommended to capture the garbage before it has a chance to reach the new compressor causing it to fail again.

  249. ryan :

    Date: November 14, 2014 @ 7:28 pm

    Have an 05 dodge ram and having heating problems. The passenger side of truck is blowing good normal hot air and driver side is blowing luke warm air at the best. I have trouble believing its heater core. Just nothing makes sense to me. Please help

  250. dennisb - Auto Tool Sales :

    Date: November 15, 2014 @ 4:28 pm

    Ryan, could be air in the system, low coolant or a door issue. Needs to be checked. Good Luck.

  251. Brandon :

    Date: February 3, 2015 @ 10:40 am

    Have a 2014 Ram 1500 Sport 4WD with 13k miles.. I’ve had air flow issues since I drove it off the lot… When I press electronic button for feet only I get Defrost and Feet.. I’ve also noticed on this model that the fresh air door opens when it wants. I took it to the dealer and they say the fresh air door setup for variable open and close… (Don’t like but can live with).. My main issue is the air flow and it sounds as if doors aren’t closing… Thoughts? Dodge has replaced the four actuators and a arm for the fresh air door. Still not corrected… Just looking for a fix so I can enjoy my truck.

  252. dennisb - Auto Tool Sales :

    Date: February 3, 2015 @ 10:57 am

    Brandon, this article and our fresh air door are for the 2002-2006 model years. The dealer should be best equiped to handle a problem like yours especially a 2014 with 13k under factory warranty. Sorry I couldn’t assist. Feel free to comment once the dealer figures out the fix. Good Luck.

  253. Radar :

    Date: April 26, 2015 @ 10:35 pm

    Hi, I have a 2012 Ram 1500 ST Express. I have a problem where my A/C will work fine, until I’ve been driving for about 15-20 minutes. The air will stop blowing out of the vents, but I can here the fan blowing hard. If I stop and turn the engine off for a few minutes, it will work fine again for another 15-20 minutes. Sometimes, if I move the knob to the defroster and back, it will work again, but that doesn’t work all the time…help, please!

  254. dennisb - Auto Tool Sales :

    Date: April 27, 2015 @ 7:32 am

    I have an article that covers most likely causes of a car’s AC to stop blowing cold after a few minutes. I talk about an old 1980 Chevrolet that my parents owned when I was growing up. The problem can occur on just about any vehicle though since most have expansion valves. Check it out for more information.

    Car AC Blows Warm After a Few Minutes

  255. jimD :

    Date: May 24, 2015 @ 4:48 pm

    Hi Dennis. I have an 05 dodge ram 1500. A/c is cold on drivers side and warm to cool on passenger side. I pulled the whole dash and the actuator and recerculator door are both in good shape. I can see both working fine. Any ideas? After driving for a period of time the passenger side gets cool but not cold

  256. dennisb - Auto Tool Sales :

    Date: May 26, 2015 @ 10:02 am

    Hey Jim, I would check the refrigerant charge. Just a little low on refrigerant can cause this problem, especially on dual zone AC systems. Good Luck.

  257. Mike :

    Date: June 6, 2015 @ 9:16 am

    Hello Dennis,
    I have a 2007 diesel Ram mega cab, the passenger side AC blows colder then the driver’s side, I do not have zone control AC. We took a long trip last weekend & on the way home the air was hardly blowing no matter what speed the blower was on & it was making a fluttering noise. We stopped to fill up then it started blowing properly but still with the variation in temperature. I have the dash partially pulled, but there is still something holding it in that I cannot find. The fresh air door at the top of the dash behind the glovebox looks as if it moving freely when the AC mode is changed. Any information would be appretiated.

  258. dennisb - Auto Tool Sales :

    Date: June 8, 2015 @ 11:15 am

    Mike rather than pulling everything, if you suspect a bad door, I’d remove the actuators and try turning the doors by hand. If you can spin them completely around rather than just 180 degrees, it’s probably broken. Good Luck

  259. Zac :

    Date: June 18, 2015 @ 11:24 pm

    Hi Denis I have a 2009 dodge ram 3500 my problem is I have A/C on and it’s single zone I don’t have dual zones. the driver side is not cold it feels like room temperature it’s not hot but not cold like it should be.the passenger side is cold I just bought this truck from a private seller I noticed the A/C didn’t work so I took it to shop they vacuumed Freon out they said it was a little low so they put correct amount in. It ran great for 2 weeks. now I am having that problem with driver side not cold. I changed out blend door actuator just to be safe the recirc door looks good just don’t know. You think I am low on freon again. Any help would greatly be appreciated thanks

  260. dennisb - Auto Tool Sales :

    Date: June 19, 2015 @ 7:57 am

    Hey Zac, I would suspect a leak, since it worked ok for awhile after the correct charge was put in. Common leaks on those trucks are the evaporator. It’s not easy to detect a leak there sometimes because you can’t visually inspect them. A good reliable refrigerant leak detector may help but sometimes still difficult to diagnose. On faster evaporator leaks you may see a little oil and/or UV dye at the drain. Good Luck.

  261. SSINC :

    Date: June 22, 2015 @ 3:46 pm

    I have a 2004 Ram with this exact issue. I mean the above photo of the busted piece is an exact match to mine. 1st of all I’m a Dodge guy all the way but what a poor design cheap weak link piece of junk that door is to break like it did. Anyways since I got a 04 with 100,000 miles I was not gonna spend the time or the $ to pull the whole dash so I did what many of the above guys did take out the blower motor with 3 T-20 screws grab a light & sure enuff found the broken door blocking all the air so with some careful twisting & turning & shaking & good hand work I got the whole door out in 1 piece. Total time about 15 min & it works just fine now. Had my truck been newer I would of prob wanted it fixed to oem specs but I plan to trade it in within the next few years so it will be just fine for me no need to stick any more $ into it. I just want to thank everyone on this website for all the great advice I now have working AC in my truck & it cost me no $ at all. THANKS GUYS !!

  262. BillyGoat :

    Date: June 22, 2015 @ 9:43 pm

    2008 Dodge Ram 1500. Took out glove box and could see the fresh air damper/door is in place and pulled the blower fan motor, nothing broken in there. I felt back inside and the evaporator core and it felt iced. The problem is 80F on drivers Side. 60F passenger side. I checked the door that blocks heater core and it seems to be moving good. What am I missing? One thing I noticed is the liquid line is iced over and fan on condenser is new. Everything under the hood is new.

  263. dennisb - Auto Tool Sales :

    Date: June 23, 2015 @ 7:19 am

    Iced over evaporator core usually means the expansion valve is bad or moisture in the system. I’d check the low and high pressure readings and go from there. See our AC gauge readings explained for more on diagnosing, going by the pressure readings. Good Luck.

  264. Juju :

    Date: June 24, 2015 @ 2:31 am

    Should make a short video.

  265. Fred :

    Date: July 26, 2015 @ 10:42 am

    I have a 2006 Dodge 2500 SLT 4WD 5.9 with a similar issue to the others, but not exactly the same. The A/C will blow cold air out of both sides when the truck isn’t moving. When it is moving the passenger side air is significantly warmer than the drivers side. It happens with the control set on either recirculate or regular. Does this sound like a broken recirculate door?

  266. dennisb - Auto Tool Sales :

    Date: July 26, 2015 @ 2:28 pm

    No. I would check the refrigerant level. Good Luck.

  267. Robert :

    Date: August 9, 2015 @ 11:45 pm

    OK I have read most of this and have not come quite across the problem I am having. I have a 2001 Dodge 2500 the Ac was charged by a certified shop. We turn the air on and we can hear the fan blowing but at times nothing comes out of the vent. But then if we switch things around or turn it off for a bit and turn it back on we finally get the air flow back out of the vents. But if we turn down the speed of the fan for to long and go to turn the speed back up we start to not get the air flow we had. Any ideas?

  268. dennisb - Auto Tool Sales :

    Date: August 10, 2015 @ 7:31 am

    Evaporator Freezing up. Normally the water that collects on the evaporator exterior fins drains off and drips under the vehicle through the drain tube. If the evaporator reaches 32 degrees for an extended period of time this condensate/water freezes. The ice will form a shield not allowing the air to be blown through, which could be the reason the air is not blowing out of the vents sometimes. 1. Check the drain. Too much water collecting is not what you want. It needs to drain off quickly. 2. Check the readings. If the low side is getting too low, the evaporator temp may get to freezing temp. Good Luck.

  269. Mike :

    Date: August 22, 2015 @ 12:00 pm

    I have a 2004 Dodge Ram. The recirc door was broken, and while replacing it I noticed that the motor for the door was turning a 1/4 turn one direction and a full turn the other direction. I replaced the motor with a new one and it did the same thing. Could something else be wrong like the HVAC control module or is this the way it is supposed to work?

  270. dennisb - Auto Tool Sales :

    Date: August 22, 2015 @ 5:34 pm

    It self calibrates after you install everything. Can’t calibrate if it’s not hooked up. Good Luck.

  271. kevin :

    Date: August 28, 2015 @ 7:29 pm

    I have a 2001 dodge ram the compressor kicks on and off, the pressure for Freon is good, thought it might be low pressure switch so I replaced it still kicks on and off any ideas?

  272. dennisb - Auto Tool Sales :

    Date: August 29, 2015 @ 10:15 am

    Kevin, It’s normal for the AC to cycle on and off. If it’s not cooling and cycling too much, the most common cause is low refrigerant. I’d check both low and high pressures – see our Car AC Gauge Readings Explained article. There are two pages to this article, the second page has gauge readings and explanations. See what the pressures are when the compressor kicks off. If the low side is too low and the AC is not cooling and the refrigerant charge is NOT low, then it could be a bad expansion valve. If the high side is approaching 500psi, the engine could be overheating or the condenser fan may not be working. Good Luck.

  273. Bill :

    Date: September 1, 2015 @ 9:06 pm

    Fantastic Information! I appreciate you taking the time to answer everyone.
    I have a 2003 2500 Diesel and the air flow on the a/c goes to almost nothing when towing under a load. If I drive easy it does not go out. It is cold, just no air. If I stop for 30 min it works again. My two thoughts are either freezing up and or a vacuum problem?

  274. dennisb - Auto Tool Sales :

    Date: September 2, 2015 @ 7:52 am

    As you know, this article is on Dodge Rams. Diesel engines don’t create a lot of vacuum so I would guess (without checking any literature) that your mode door is controlled by an electric actuator. It could be affected by lower voltage when there’s high demand on the electrical system or by an inadequate ground. The blower itself could be slowing down also for the same reasons. Since you don’t have the problem when driving normally without a heavy load, I wouldn’t think the system is icing up. It could freeze up regardless of the load the truck is pulling. I’d check the manual to study the system and see what type of actuators it has for sure. And also listen for the blower motor sound in case it’s slowing when the problem occurs and go from there. Good Luck.

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