Low Air Flow From AC Vents – Auto Repair Tips/Tools

9:52 am Air Conditioning, DIY, How To Auto Repair

Leaves_PT_Cruiser_2

Leaves accumulated near the fresh air intake can enter the car’s evaporator case.

© DenLorsTools.com Summary: Article on low flow from air conditioning vents in cars. Neglected cabin air filters are the leading cause of this issue. Although, there are several things that can cause low airflow from a vehicle’s air conditioning system. The strongest blowing vents are the middle ones with the setting adjusted to maximum or recirculate. On the max setting, the air is recirculated in the passenger compartment. Obstructions can include leaves, loose articles from the glove-box, a broken or out of position door in the Heating Ventilating & Air Conditioning (HVAC) case.

Most people don’t realize that many vehicles come with a cabin air filter. One of the first things to check for when experiencing low airflow is to see if the car has a cabin air filter and if it does, check to see if it’s dirty. The cabin air filter is very similar to a home air-conditioning filter just on a smaller scale. Like the home air-conditioning filter, the cabin air filter for a car can become dirty and restrict air flow. In addition to the dirt and pollen, a car’s air-conditioning filter can also be obstructed by leaves. This is especially true if the car is regularly parked under trees. A quick check in the vehicles owner’s manual should reveal if the car has one and where it is located.

Usually cabin air filters are found in the following locations

  1. Many BMW car’s and some others are located under the hood just below the windshield.
  2. Numerous autos have the filter located behind the glove box.
  3. On many Chrysler vehicles there’s a thin removable panel on the passenger side, lower portion of the evaporator case (behind dash panel) to access the filter. This is a good place since debris like leaves will settle in the bottom and can be easily cleaned out when the filter is being changed.

Aviator_Glove_Box

Glove compartments usually aren’t sealed off, this can allow items to fall out the back. 

Overflowing glove compartments – noisy blower motor

The air return is usually located behind the glove box. Sometimes with an “over full” glove box; contents like napkins, vehicle registration or anything else can fall out of the back of the compartment when it is closed and can be drawn into the air return. If this happens, the air flowing into the return can be restricted causing less air to blow out of the vents. If debris ends up traveling all the way to the blower fan, vibration and a low flow will be the result. Just one leaf in a blower motor fan can cause noise and vibration. On some cars the glove box door can be unhooked and swung down to check for articles that may have fallen out of the glove compartment; with some luck the obstruction could be on the outside of the air return. Other times the blower motor may need to be removed and any foreign debris removed. The fan attached to the blower motor is round and sometimes called a squirrel cage, due to it looking a lot like a hamster exercise wheel. On numerous vehicles the blower motor is fairly simple to remove, with others it can be quite a task. If it can’t be determined how big of a job it is to remove the blower motor by just looking at it, a service manual can be checked to see how involved it is on the particular model. Even the labor time can indicate if it’s an easy job or more involved. A lot of times a noisy or vibrating blower motor is remedied simply by removing it, cleaning it and reinstalling it.

More serious problems

It’s good to start with the basics but if the cabin air filter and the blower are not the cause of low airflow, then an actuator or HVAC door could be the problem. Sometimes an actuator which is a small electric motor or vacuum operated device for moving the doors within the case can fail. Without the actuators working properly the air isn’t directed the way it’s supposed to go causing low airflow or incorrect airflow. Other times the door itself can break causing similar problems. If the fresh air/recirculate door breaks, it can sometimes fall down over the blower fan almost restricting the airflow completely.

 

Question – I have no airflow. Someone told me the resistor might have gone out. The blower motor does not run at all, can you help?

Answer – Usually with a bad blower resistor, the high speed would still work; so I wouldn’t suspect that is your problem. The most common causes would either be a bad blower motor or a poor connection at the electrical plug (that goes to the blower motor).

Question – I have a 2006 Pontiac GTP, I can’t see any screws holding the blower motor – how do I change it?

Answer – The blower motor plastic housing has to be cut to remove it. There is a thin groove to guide the cut, use a hot knife to easily cut it. Be careful and stay within the groove though because the plastic housing will be re-used with the replacement motor.

Question – I have plenty of airflow, but the air is not cold – any suggestions?

Answer  -Start with checking the pressure readings for the AC system. Most of the time if the air conditioning is not cold, it’s because of low refrigerant.

Question – I have a 2003 Jeep Grand Cherokee with dual zone AC. Why would the passenger side AC be hot and the driver’s side is cold?

Answer – Sounds like there is either a bad actuator or a faulty blend door, see our auto repair tech article covering this common problem with Grand Cherokee broken blend doors.

If there are questions related to “Low Air Flow From AC Vents – Auto Repair Tips and Tools” that weren’t covered, feel free to ask your question below – only truly relevant questions will be published. Thanks.

Related Car Repair Articles and Products

Adding Freon to Car AC – Gauge Readings Explained

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

Other AC Articles

241 Responses
  1. Heather :

    Date: September 2, 2009 @ 4:55 pm

    I have a 1995 subaru legacy l and now when I try to use the air/heat options, I hear it blowing but it does not come out of the two center vents. It only comes out of the vents used for defrosting the windshield. What has happened and how can I fix it?

  2. dennisb - Auto Tool Sales :

    Date: September 2, 2009 @ 8:48 pm

    Heather, there could be a door actuator issue or possibly a vacuum leak. Repair manual information would need to be checked to delve deeper if the problem is more than just vacuum leak.

  3. Sally :

    Date: October 16, 2009 @ 5:10 pm

    I have a 1999 Toyota Camry and I’m noticing that the air flow for the two driver-side vents is less forceful than the air flow coming from the two passenger-side vents. What would cause this differentiation?

  4. Michelle Walker :

    Date: December 3, 2009 @ 12:58 am

    I have a 2007 chevy Suburban. Air flow only goes to defrost vents except when it is placed to be going out the front vents! Where should I start?

  5. dennisb - Auto Tool Sales :

    Date: December 3, 2009 @ 7:18 am

    Michelle, Your problem isn’t really low flow, rather incorrect airflow. The first thing I would do is check an on-line auto repair manual for your specific vehicle and get an idea of how the system works on your Suburban and also check for TSB’s. It may be a calibration issue or a control head problem. Another idea would be to ask a GM dealership technician using our questions/answers page – dealing with specific models many times the dealer tech may know exactly what the problem is if it is a common problem.

  6. Gerald :

    Date: July 7, 2010 @ 6:41 pm

    I have a 2001 jeep grand cherokee, it blows cold air out, but even at high it barely blows any air. I’ve noticed lately that when the ac is running the passenger side hums. It seems to be getting louder. I know the motor is on that side and my main question is what’s the best way to get to it so I can figure out what is wrong. Thanks.

  7. dennisb - Auto Tool Sales :

    Date: July 7, 2010 @ 8:12 pm

    Gerald, you’re in luck. We have a recent article on a Jeep Grand Cherokee low airflow problem like yours. It most likely has to do with a broken door that is above the blower. To see the article click the following link.

    Jeep Grand Cherokee Low Flow from blower.

  8. Derek :

    Date: August 18, 2010 @ 7:53 pm

    Have a 2004 acura tl. The air seems to be blowing with less force and not quite as cool. My car takes forever to cool off. Sometimes the air starts blowing what feels like outside air and I have to turn the air off and wait a couple minutes and turn it back on and it will work again. Kind of like I’m resetting it. Also the air seems to blow a little harder when I’m accelerating or driving compared to when I stopped at a light. Any ideas? Sounds almost like multiple problems.

  9. dennisb - Auto Tool Sales :

    Date: August 19, 2010 @ 8:51 am

    Derek, Yes, it does sound like different issues. Gauge readings would need to be checked to see what’s going on with the AC system.

    See this article for more info:

    AC Gauge Readings Explained

    The blower may fluctuate a little normally depending on the RPM’s. It is also possible it is starting to fail.

  10. Andy Watson :

    Date: September 5, 2010 @ 1:49 am

    I have a 1999 Jeep Cherokee, it blows cold air fine and the power is good but it blows only onto the windscreen no matter what I set the air direction knob to?

  11. dennisb - Auto Tool Sales :

    Date: September 5, 2010 @ 8:46 am

    Andy, Sounds like a vacuum leak. Check the vacuum line that goes through the firewall near the heater hoses. Sometimes the vacuum line can leak due to the plastic line getting brittle and breaking. If there’s a vacuum leak the air mode selection usually defaults to defrost.

  12. ashley :

    Date: August 19, 2011 @ 1:07 am

    I have a mazda 3 my ac does not blow out cold it blows its just not cold do u think it could be my cabin air filter I have not changed it in 2 years

  13. dennisb - Auto Tool Sales :

    Date: August 19, 2011 @ 6:20 am

    Ashley, the cabin air filter would reduce the amount of flow if it was too dirty – it would not make the air not blow cold. You may want to see some of our other AC articles (particularly on low refrigerant, adding freon and leak detection), the most common cause of the A/C not blowing cold is low refrigerant. Good Luck.

  14. Mariposa :

    Date: October 3, 2011 @ 5:57 pm

    I need help, big time. I have a a 2002 Honda Odyssey Van. The front air-conditioning was not blowing any air at all last Thursday. It was dead. On Friday, the auto-shop told me that I need a new blower. It is replaced today. There is air blowing from the side vents but not the center vents. The mechanics told that it is probably not strong, that’s it. I was like no way, before it was broken, it blows strong till it died totally on Thursday. The rear air vents are working fine. The only way for the center vents to work is to press the button to blow to the “face/upper” vents. I wonder if the mechanic screwed up something like accidentally misplaced something or while replacing the blower, something came loose and the they are not aware of it. Please help.

  15. dennisb - Auto Tool Sales :

    Date: October 3, 2011 @ 6:44 pm

    Mariposa, seems like too much of a coincidence. The mechanic should retrace his steps to verify that nothing was accidentally disconnected or hooked up incorrectly. It’s important to know that some aftermarket blowers come without the pigtail (electrical connector) so they can be accidentally hooked up backwards resulting in a normal sounding fan but very little airflow. I installed an aftermarket blower one time that had an electrical plug but it was wired backwards from the remanufacturing plant. It was strange that the blower sounded normal but had very little air coming out of the vents. After flip flopping the wires in the plug,and plugging it back in, the blower worked great.
    If I were checking your vehicle, I would study the system. You have to understand the system before beginning to trouble shoot any problems – otherwise you are depending totally on random luck. I wish I could be of more help. Good Luck.

  16. Ashley :

    Date: October 7, 2011 @ 7:16 pm

    Can a punctured air conditioner condenser cause air from the two middle vents to be blocked? It comes out of the two side vents just fine, as well as from the floor, and also the defrost vents… Please help!

  17. dennisb - Auto Tool Sales :

    Date: October 7, 2011 @ 7:32 pm

    Ashley, A punctured condenser would cause low freon and no cooling but would have no affect on airflow through vents. Good Luck.

  18. Michael :

    Date: July 13, 2012 @ 4:37 pm

    My daughter has a 99 Sunfire that wasn’t cooling. We just replaced the compressor, but the air flow isn’t powerful at all – barely anything. Suggestions? I really want to get this taken care of for her. Thank you!

  19. dennisb - Auto Tool Sales :

    Date: July 13, 2012 @ 5:00 pm

    Michael, no common problems come to mind for the Pontiac Sunfire, besides the blower resistor for certain fan speeds. Since that’s not what you’re describing, could just be dirt accumulation on the evaporator fins (there’s no cabin air filter). Imagine a home AC system with no air filter since 1999? Could also be leaves in the blower motor area. I would remove the blower motor and clean out debris that I could reach. Maybe that will be enough to get some air flowing. Good Luck.

  20. Temperance :

    Date: August 6, 2012 @ 12:29 pm

    I have a 2004 Isuzu Ascender. My ac worked just fine then it quit blowing out of the face setting. Anytime you switch it to that setting it blows out of the feet.. its still strong and good and cold and when you switch it to vent it blows to vent and when you switch it to feet it blows there too like its supposed to. The middle ones are not working. I can put my hand up to the vents and feel very small amout of air not even noticeable unless you are completley still. Any advice?

  21. Temperance :

    Date: August 6, 2012 @ 1:07 pm

    we had just put a brand new battery on it 2days before it quit blowing outta the middle vents.

  22. Jorge Arbona :

    Date: August 14, 2012 @ 10:32 am

    I have exactly the same situation as Temperance. I parked the Ascender one night. The next day in the morning I disconected the battery to clean the base. When I installed the system back,the air condition only blows thru the feet vents.
    Any suggestios ?

  23. dennisb - Auto Tool Sales :

    Date: August 14, 2012 @ 10:57 am

    Other than trying disconnecting the battery again to reset – I would check for climate control trouble codes with a scan tool. Good Luck.

  24. Kyle :

    Date: September 2, 2012 @ 11:19 pm

    Just replaced ac motor but it is not blowing out the vents what can I do to fix it

  25. dennisb - Auto Tool Sales :

    Date: September 3, 2012 @ 7:33 am

    Kyle, Since there isn’t really a part called an “AC Motor” I don’t have enough information to help. Not aware of what year or model you are working on – you may have replaced one of the actuators, the blower/fan motor or the compressor. Perhaps a repair manual is a good place to start. Good Luck.

  26. Manpreet :

    Date: September 7, 2012 @ 3:16 am

    Hi
    In my Mazda 6 2005, air flow from the driver side vents is much less as compared to the co-passenger side vents. The cooling is reletively fine, only the air flow is very less.
    can you please advise as what could be the reason and how it can be rectified.

    Thanks

  27. Mike :

    Date: October 19, 2012 @ 11:52 am

    I have a 2009 Ford Escape. The cabin air flow now only works on setting #4. It previously completely worked. Then only on 2-4 then 3-4 and now only 4. I went to replace the cabin air filter and it had none. I did put one in. What would be my next step?

  28. dennisb - Auto Tool Sales :

    Date: October 19, 2012 @ 11:58 am

    Mike, the blower or fan not blowing on certain speeds is usually a bad “blower resistor”. Sometimes it could also be because of the switch itself, but much less often. The cabin filter would not complete stop particular speeds – a dirty filter might slow down over-all flow. Good Luck.

  29. Q :

    Date: October 26, 2012 @ 6:25 pm

    My heat and air conditioner stopped working. After replacing the blower motor the heat and air conditioner is working but it seems as if air is barely blowing out. My coolant level is fine and I changed my cabin air filter what can be the problem?

  30. dennisb - Auto Tool Sales :

    Date: October 27, 2012 @ 8:05 am

    If airflow was good before the old blower stopped working, I would check the wiring on the replacement blower motor. On aftermarket blower motors, I’ve seen the two wires reversed making the blower turn backwards. Good Luck.

  31. Katie :

    Date: February 6, 2013 @ 10:55 am

    I have a 1999 Jeep Grand Cherokee – The airflow on the driver side (especially through the ground vents) is extremely low compared to the passenger side. It’s most notable on the ground vents but all vents on the passenger side have more airflow. Any ideas?

  32. Katie :

    Date: February 6, 2013 @ 10:56 am

    side note to my above comment. Heating and cooling do not seem to be an issue, it’s just the airflow on the driver side is super low. Thanks.

  33. dennisb - Auto Tool Sales :

    Date: February 6, 2013 @ 11:06 am

    Katie, dual zone Jeep Grand Cherokees have a common problem with the doors breaking. See our article on a DIY type fix if this is the problem by clicking the following – Grand Cherokee Blend Door Fix.

  34. YolandaT :

    Date: March 19, 2013 @ 1:59 am

    I had my waterpump and transmission changed back-to-back on my 2002 Chevy Suburban in February. I picked up my suburban and the next day it was cold in the morning so I turned the heater on and noticed that it was stuck on defrost. I called the maintenance place and told them but they made me seem like an idiot and said they had nothing to do with it. It is now March (happy cuz my defrost won’t warm the cabin faster than the dash vent)and here in Cali I am now using the a/c through the defrost. And I just noticed after using the a/c that there is a huge leak coming from underneath my ride. I don’t know what to do.

  35. dennisb - Auto Tool Sales :

    Date: March 19, 2013 @ 7:35 am

    It’s common in many situations in life for people to snap back and be very defensive when they are accused of being at fault for something (if they really are at fault or not). Not saying that the shop was at fault, but a better way of handling this would have been to have the shop look at the problem as soon as the problem was discovered. Asking them if it’s possible that something was inadvertently disturbed when work was being done, causing the issue. When I worked at repair shops in the past, I was much more accommodating when customers were reasonable and well… nice. Their tone would many times dictate how I responded.

    Sounds like there could be a vacuum leak going to the HVAC (Heating, Ventilation & Air Conditioning) system. Since the controls use vacuum motors to control the mode, a vacuum leak (lack of vacuum) can cause the system to default to the defrost vents. The huge leak underneath the vehicle after running the AC is most likely just water from normal condensation draining off the evaporator. Just like the house AC drips while it’s operating normally. Good Luck.

  36. AnthonyD :

    Date: April 10, 2013 @ 10:20 pm

    2003 chevy express van 1500 4.3 v6

    A/C blows cold. All fan speeds work fine, or appear to work fine, meaning the motor does change speeds when a selection is made, and there are 4 speeds. In the past when A/C was selected on the dial it blew cold air, but not nearly as much air as the max A/C setting. I know that is because Max means recirculate. The doors all seem to work fine when whichever one is selected. I’ve had vacuum lines separate in the past, and I could hear them pulling in air. Once put back together things went back to normal. Lately the Max setting doesn’t blow any harder than the outside A/C setting, but the fan door opens inside so it gets louder, and the outer door closes. I used a tissue to verify it wasn’t blowing out the cowl intake entrance. I can’t figure it out. I took the blower motor housing apart and found lots of leaves and dirt, and the coil in there was pretty filthy but still no improvement after all of that. I have even tried using a blower while i had the system opened up to blast out anything that might be lodged in the duct work. No luck. What the heck is wrong? 120K miles, could the motor just be too weak at this point to blow harder? It seems like it is pulling in a massive amount of air so where is all of it going??? Can’t find a separation in the dash, and there is no cabin air filter, as that was my first guess since the airflow doesn’t increase beyond a certain point. This thing would literally blow you out of the seat when it was newer, so much so it was difficult to find a happy medium temperature so it was high and low high and low and everything in between. Never a problem and then I noticed there was not much air coming out. What is coming out is very cold so I am assuming that the levels are ok. I would be very grateful for any ideas in troubleshooting this. I notice that when the engine is under more extreme conditions like pulling a trailer on the highway that the blower actually almost stops. Not sure why that is either, but it usually comes right back on once I back off the gas and reduce the load.

  37. dennisb - Auto Tool Sales :

    Date: April 11, 2013 @ 7:45 am

    Anthony, Unfortunately on vehicles that are not equipped with cabin air filters, all the pollen and leaves could end up further in the evap case blocking the flow on the evaporator and/or heater core themselves. This would require more work to access with a shop vacuum and compressed air to clean. The other thing I wanted to point out is that the AC compressor will turn off while the engine is under load, making any air that is still making it’s way through the vents not very cold. This is normal. As far as the blower motor slowing down, it is also normal for the speed to vary a little when other electrical demands change. Good Luck.

    For other readers; in case they do have a cabin air filter (or “filters” plural-because there could be two side by side) they could be dirty and restrict a lot of air flow. See the video for instructions on how to change the cabin air filters on a pick-up trucks and possible Chevrolet vans too between 1999-2002.

  38. Joey :

    Date: April 20, 2013 @ 9:48 am

    I have a 1993 C1500 Pickup. AC works fine when driving, but fan has no-to-low air flow at a full stop. Any suggestion as to the cause?

  39. dennisb - Auto Tool Sales :

    Date: April 20, 2013 @ 10:09 am

    Although it’s common for the speed to slow down a little when the idle is low and the alternator is putting out less voltage; 1. I would test the battery and charging system. A marginal battery or charging system could cause this. 2. The blower motor could be failing. I would tap lightly on the motor to see if it speeds up temporarily. If it speeds up plan on replacing the blower motor soon.

  40. Gilbert :

    Date: May 12, 2013 @ 12:08 am

    I have a 94 Camry the ac air will blow from the defrost and the floor and the side vents but not from the middle vents. Any idea on how I can fix it?

  41. dennisb - Auto Tool Sales :

    Date: May 12, 2013 @ 8:36 am

    Gilbert, sounds like the linkage for changing the vent direction may have broken and disengaged. I would operate the controls changing where the air should go and look for movement from the actuator (door motor). I would look up from the driver’s side with a flash light towards the center. Some plastic trim may need to be removed to gain access. Years ago I worked on a car that had a similar problem. I found where the cams and linkage had came apart. Good Luck.

  42. mike :

    Date: May 27, 2013 @ 12:44 pm

    Dennis i have a 1996 mercury grand marquis with low air flow from the driver side vents. There is no cabin air filter in this car. You mention the the evap case above.
    Thanks You Sir for any help.
    Mike

  43. dennisb - Auto Tool Sales :

    Date: May 28, 2013 @ 7:27 pm

    Mike, the case could be full of leaves/trash. I would remove the blower for access and check. Good Luck.

  44. rickl :

    Date: June 8, 2013 @ 11:40 am

    Dennis, I have 2003 Chrysler Town and Country with Auto Temp Control. When I drive at speed (say over 50 mph) for 40 minutes or more the air in the vents goes down to near if not nothing and most of the air comes through the floor. Moving the mode switch does nothing. The actuator door motors and the ATC control have been replaced. I’ve ran the calibration. No fault sets. I’ve watched the actuator to the mode door (the gears rather)when it was failing and the motor seems to follow the mode switch fine but the air flow doesn’t change. Everyone wants to replace the new (1 year old) ATC control. Could something weird be happening mechanically with the door inside? Also when messing around under the dash I notice that air is always blowing out of the intake filter. Even when recirc is on. Any hints?

  45. dennisb - Auto Tool Sales :

    Date: June 8, 2013 @ 1:33 pm

    Rick, since there are no fault codes and the problem does not occur until after you’ve driven quite awhile, I suspect that the evaporator is freezing up. Normally the water that collects on the evaporator drains off and drips under the vehicle. If the evaporator reaches 32 degrees for an extended period of time the water freezes. The ice will form a shield not allowing the air to be forced through, which could be the reason the air is blowing out the intake. The temp sensor probe (called a thermistor) is supposed to signal the controller an accurate temp reading so the compressor will cycle, preventing freezing up. I’ve replaced those sensors before for this reason. I’ve also just re-positioned the probe to get the compressor to cycle and not cause evaporator freeze up.

    Example of a thermistor or temp sensor in an evaporator.

  46. Amanda :

    Date: June 13, 2013 @ 7:13 pm

    I have an 01 Dodge Caravan Sport. When I turn my ac or heater on it makes an weird humming noise as if I can hear the fan motor but loud. It still blows cold air and hot heat. And after a few minutes the noise gets a little quieter doesn’t go away but gets quieter. What could this be?

  47. dennisb - Auto Tool Sales :

    Date: June 13, 2013 @ 8:33 pm

    Amanda, could just be the blower motor bearings wearing out or leaves and debris obstructing the fan blade. Good Luck.

  48. Amanda :

    Date: June 14, 2013 @ 10:40 am

    If its the blower motor is this something located under the glove box or under the hood? If the bearing is going out would the whole blower motor have to be replaced?

  49. dennisb - Auto Tool Sales :

    Date: June 14, 2013 @ 11:25 am

    Amanda, blower motors on most vehicles are behind the dash on the passenger side. There are a few that are accessed from the engine compartment under the hood. I would look up repair manual instructions to R&R (remove and replace) the blower motor for your specific model. Use a manual like Alldata, that can be accessed online.

    Like I mentioned there may have leaves inside the case touching the spining fan causing the noise. If the blower motor bearings are faulty the whole motor would be replaced not just the bearings.

  50. matthew :

    Date: June 19, 2013 @ 9:01 am

    2005 Chrysler Town & Country
    Air stopped blowing this morning. Turned blower up to highest setting, and it started coming out slow, but still cold. Uncle thinks it might be compressor freezing up.

  51. dennisb - Auto Tool Sales :

    Date: June 19, 2013 @ 9:23 am

    Matthew, the compressor freezing up is not a common issue and would not restrict airflow. The compressor just pumps refrigerant and does not directly have anything to do with airflow.

    Problems with the Blower

    1. Occurs at all times; The blower is not making any noise at all except for on high speed, indicates a faulty blower resistor.
    2. Occurs after the vehicle has been ran with the AC on for awhile; The blower continues to make it’s normal sound but is not moving air, may indicate an iced up evaporator blocking all or most of the airflow.
    3. No sound on any speed obviously indicates a bad blower motor. Double check by making sure power and ground are supplied to the motor.

  52. Rebecca :

    Date: June 28, 2013 @ 12:04 am

    Hey, Dennis- Of the countless websites I’ve searched, I’m going to give commenting on this one a shot.

    I have a 2010 Toyota Yaris. No previous issues. I noticed what I later decided was the AC fan making a strange sound; like a bag stuck on a fan or something- Every time I make left turns. Then, came the mildewy, old wet bathing suit smell in my car. I finally realized the passenger seat floor was soaked.

    The condensation water drips from the AC when it’s on, and mostly when I make left turns (at least it seems more so when taking lefts.)…

    The hose attached to the upper left corner of the floor under the carpeted area is not clogged, it looks just perfect. The water is dripping from beneath the glove compartment which on further inspection appears to be coming from what I now know is the blower motor… Somewhere there.

    A possible important fact: When I went to take a good look by removing the slightly hanging paneling beneath the glove compartment, my long-lost hair brush fell out. It had been in the glove compartment and obviously fell behind it, and through where the AC is. It didn’t look like anything was broken or “undone” up inside there, though. I am wondering if something else may have fallen into the blower, is causing a blockage THERE, and that is why it’s leaking from there.

    If you can, please help a girl out- I am trying to learn more about cars, and unfortunately I don’t have very much money so I am REALLY hoping this is something I can pinpoint and fix on my own. I’d appreciate any feedback… !

    Thank you so much in advance..!

    -Rebecca

  53. dennisb - Auto Tool Sales :

    Date: June 28, 2013 @ 9:00 am

    Rebecca, thanks for commenting and providing as much info as you could. It is true that sometimes items from the glove box can get drawn into the evaporator case through the air return. Fast food napkins stored in the glove compartment are light enough to get sucked in, if the air return is situated close enough and the back of the glove box is an open design. Most likely though, there is some build up from leaves/dirt blocking the drain. Even-though it is draining it may not be draining fast enough to prevent water from building up in the evaporator case. In conditions of high humidity this problem is much more prevalent. That’s why no one in dry climates like in Arizona for example, usually have to worry about this problem. Just a side note; As I’m writing this, Arizona is expecting a near record high temperature of a 130 degrees. The only temp hotter there was back a hundred years ago reaching 134! And I though mid 90’s in Florida was hot.

    How to Clear the Drain
    If the hose cannot be removed completely I would try cleaning the drain out with a metal hanger when I knew there was enough water inside to be sloshing around. It could be stopped up just inside the case where the hose attaches to. If the drain is cleared, water will come gushing out. If that doesn’t do the trick, the blower motor could be removed and debris removed with a wet shop vacuum. Further flushing can be done with a water hose, being careful not to drench electrical components. Read more on this in our article on AC Water Leaking Inside the Car. Good Luck.

  54. mkaram :

    Date: June 29, 2013 @ 12:50 pm

    I have a 1998 S320 .Ac is working except that the air is cooler on the right middle vent than the left one

  55. dennisb - Auto Tool Sales :

    Date: June 29, 2013 @ 4:25 pm

    Most likely cause is low refrigerant. See our ac gauge readings explained article for more information. Good Luck.

  56. louis H :

    Date: June 29, 2013 @ 10:32 pm

    I have a 1999 jeep Cherokee 2wd 4cyl 2.5l . My blower doesn’t come on sometime when I start my car up. I tap under the dash by the glove box with the back end of a screwdriver a few times it will come on. it doesn’t blow as hard as it should. but when I make a left turn it blows harder. can u tell me what the cause is????

  57. louis H :

    Date: June 30, 2013 @ 12:27 am

    I also noticed when I first start my jeep after its been sitting still (cold) the blower blows strong although I still have to hit it sometimes to get the fan to come on. Im a pizza delivery driver and I drive my jeep about 4 to six hours per shift and near the end of my shift is when the blower gets weaker and does what I said in the first comment above

  58. dennisb - Auto Tool Sales :

    Date: June 30, 2013 @ 1:27 pm

    Most likely the motor failing. I would also inspect the connectors and resistor when replacing the motor. Good Luck.

  59. mkaram :

    Date: July 1, 2013 @ 3:24 pm

    HIGH
    2004 QX56
    I have removed the AC filters located behind the glove box and cleaned them and before I put them back I switched the car and the AC on to the maximum for about one minute .Does this cause any problems as I have noticed that the AC is cooler on the left vents than the other right ones.Should the arrows on the filters be heading downwards or upwards?
    THANK YOU

  60. dennisb - Auto Tool Sales :

    Date: July 1, 2013 @ 5:11 pm

    The most common cause of a difference in temperatures from side to side is low refrigerant. Check out our AC gauge readings explained article. The arrows should face down on the 2004 to 2010 QX56. Good Luck.

  61. RVK :

    Date: July 3, 2013 @ 4:05 am

    My 2000 Toyota Camry LE delivers air only when set to the max flow. At lower settings it gives little or no air. It heats or cools only when set to max position. How do i fix it? Or do I need to take it to a shop?

  62. dennisb - Auto Tool Sales :

    Date: July 3, 2013 @ 6:35 am

    The blower not working except for on high is usually the blower resistor. Good Luck.

  63. darlene :

    Date: July 15, 2013 @ 8:03 pm

    I have a 1998 Toyota Camry. The blower was plugged with pine needles so I had it replaced. The side vents have air flow restriction. I believe the ducts may be full of pine needles. How can I access to clean them out? Thank you

  64. dennisb - Auto Tool Sales :

    Date: July 16, 2013 @ 7:54 am

    Darlene, unfortunately there is no cabin air filter for the 1998 Toyota Camry. But except for a very small amount, usually debris will not make it past the blower motor, evaporator and heater core. Some people may suggest removing the blower motor and to use of a leaf blower or compressed air from an air compressor to blow the pine needles out of the ducts and through the opening where the blower mounts. I do not recommend this because the fins for the vents could be broken and it’s possible that the HVAC (Heating Ventilation and Air Conditioning) doors could be broken as well with too much force of air. Besides like I said previously, it’s not common for leaves and debris to make it that far into the duct work. A more common issue is having a blockage of air flow that affects all the vents, usually at the evaporator core or heater core. I would have a knowledgeable mechanic in your area check the ducts with an inspection scope. If the ducts are clear he can then check actuators, cams and doors that divert the air to the outer vents. It could be just a control issue and not plugged ducts after-all. Be sure when calling to set up an appointment with a local shop that they have either a video inspection scope or a bore-scope and have experience working on HVAC systems. Good Luck.

  65. norma :

    Date: August 3, 2013 @ 8:01 pm

    My ac knobs seems stuck on the front and feet vents i cant get it back to just the fron vents so now the pressure is divided between the 2positions. Any advice on how to fix that?

  66. Ryan :

    Date: August 19, 2013 @ 5:59 pm

    I have a 09 Dodge Journey and no matter what position I put the mode to: defrost, vent or floor it hardly blows any air. I can hear the blower motor running and hear it change speeds with the switch but low or high it seems like it’s stuck in low.

  67. dennisb - Auto Tool Sales :

    Date: August 19, 2013 @ 6:09 pm

    The first thing I would check is the cabin air filter.

  68. Santos :

    Date: August 22, 2013 @ 4:06 am

    2008 ford fusion.

    I’m on a road trip to Texas from Chicago. Air was working great. I stopped to get some food hopped back in and the air flow from my vents were very poor. 1/2 hour later there is no air flow at all. I can hear the blower motor running. Any suggestions?

  69. dennisb - Auto Tool Sales :

    Date: August 22, 2013 @ 7:41 am

    Santos, the only thing I can think of (without being there to inspect the car) is that perhaps a napkin from the food stop has gotten drawn into the fresh air return from the glove box. I would check the cabin air filter (behind the glove box) to see if a paper, a napkin or something like that is blocking the airflow. It wouldn’t just be a dirty cabin air filter because that would start to restrict flow over time as it became dirty. Something large like paper could block flow drastically all at once. Good Luck.

  70. Desh :

    Date: September 16, 2013 @ 11:01 am

    Hi Dennis,

    I have a 1999 Toyota Corolla VE. It’s air flow and AC were running great until they stopped suddenly while I was on the road. There is no air flow. And if I turn on the AC, I can hear a change in engine sound and feel a bit of cold if I put my hand near to the vent. Any suggestion? Thank you very much in advance.

  71. dennisb - Auto Tool Sales :

    Date: September 16, 2013 @ 11:33 am

    Desh, sounds like the blower motor may have failed. I would try all speeds to see if any work. Usually if the motor is bad none of the speeds will work. If the blower resistor is bad the blower might work on the high speed only. If it doesn’t work at all, the next step is to test for power and ground at the blower motor electrical connection. Good luck.

  72. carol :

    Date: October 8, 2013 @ 7:02 pm

    hi. I have a 2012 chevy impala ltz…everything worked before I had a new cabin air filter put in…now the front vents dont blow air and I can hear the struggle of comprimised air..I went back to the place and had him check to make sure it was in correctly…anything else? what can it be? thank you

  73. dennisb - Auto Tool Sales :

    Date: October 9, 2013 @ 7:58 am

    Carol, since the car’s ventilation system blew air out the front vents previous to the cabin air filter change, it stands to reason that something was most likely disturbed. I would look at the area to see if there are any loose connections to the actuators. Besides that; if the place where you had the cabin air filter installed does not have a qualified technician to diagnose the issue, I would take it to a repair shop that does. Keep your receipt if it’s determined that incorrect cabin air filter instillation was the cause of the issue.

  74. karl :

    Date: October 16, 2013 @ 1:33 pm

    I have a 2012 chevy impala. sometimes, when you turn on the air for the feet, it will blow out the dash vents, and vise versa. however, sometimes it works just fine. What is wrong?

  75. dennisb - Auto Tool Sales :

    Date: October 16, 2013 @ 1:54 pm

    Karl, could be the actuator starting to fail. Good Luck.

  76. linda :

    Date: December 12, 2013 @ 5:11 pm

    I have a 2006 grand caravan with dual blowers. The front is blowing very little air back is working fine. I’ve noticed that when I drive at a faster speed the blower does have more air force. Won’t change speed when you move knob. Was just driving and noticed the change. Could you help me?

  77. dennisb - Auto Tool Sales :

    Date: December 13, 2013 @ 7:20 am

    Linda, I would check power (and ground) at the blower to make sure it’s getting the power it needs to run. The air you get may not be from the blower, it may be just from air entering the fresh air inlet forced in while the vehicle is moving. Also on some Grand Caravans there’s a cabin air filter which could be very dirty and restricting flow. You should still hear a change in the blower motor sound when the blower speed has been changed. Good Luck.

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  78. johnny :

    Date: January 1, 2014 @ 4:17 pm

    On a 98 Jeep Grand Cherokee my ac only blows on defrost I think I have a vacuum problem I’m not sure. But now its blowing very low cold air. I’m not sure where the problem could be. Any suggestions?

  79. dennisb - Auto Tool Sales :

    Date: January 2, 2014 @ 6:41 am

    I would look and listen for vacuum leaks under the hood and dash. Also a hand pumped vacuum gauge is sometimes helpful to check vacuum lines and vacuum controlled motors. If I was working on this in a shop, I’d use a smoke machine if needed. Most vacuum leaks are under the hood though because of the more harsh conditions. Battery acid, heat etc. can all cause problems. The main vacuum line for the HVAC should be near where the AC lines go through the firewall. Good Luck.

  80. Lowflowchevy :

    Date: January 2, 2014 @ 11:08 pm

    I have a 2004 silverado 2500hd and I’m stumped… The blower motor is working on all settings. The mode actuator is switching correctly from defrost to floor to vent but when I slide the two temperature selectors to hot I loose significant air flow on all mode settings. I bring them back to cold/blue and my air flow volume comes right back to normal. Any thoughts?

  81. dennisb - Auto Tool Sales :

    Date: January 3, 2014 @ 8:30 am

    Something restricting airflow only when heat is selected. Possibly the heater core blocked with debris restricting airflow or a napkin that got sucked into the system from glove box etc… Good Luck.

  82. Alex O :

    Date: January 20, 2014 @ 8:21 pm

    So my 1993 Grand Caravan LE 3.3L all of a sudden started to not blow air (warm or cold) through the face vents when on any setting past 1. The speed settings go all way to 4 and so if you push the selector switch to face and speed to 1 the air will blow through the face vents, but if you go past 1 then there is a bang sound from to the right of the gas pedal (in the cabin) and the air defaults to the defrost position and no amount of pushing the face or feet/face button does anything. Also if the speed selector is a 2,3, or 4 and you select face the air stays at defrost. The only way to get it to go to face mode is to turn it OFF and then back on to speed 1.

    I’ve looked and blew through the check valve under the hood by the brake booster and it functions as it should. The vacuum cables behind the controller are connected at the junction and the three metal ball things to the right of the gas pedal all have vac. lines connected to them. I’m at my wits end!!!

  83. dennisb - Auto Tool Sales :

    Date: January 21, 2014 @ 10:11 am

    Alex sounds like a broken door. The faster speed and increased airflow is probably enough to move the door changing the direction of the air. This most likely would only happen if the door is broken. If I could gain access to the mode actuator I would remove it and turn the shaft for the door by hand to see if it is broke. If it is broken I would be able to spin it 360 degrees. Replacing the door would require dis-assembly of the dash and HVAC case. Good Luck.

  84. Alex O :

    Date: January 22, 2014 @ 10:17 am

    Dennis,

    Would it be by my gas pedal where I hear the banging??

  85. dennisb - Auto Tool Sales :

    Date: January 22, 2014 @ 10:29 am

    Most likely up from the gas pedal and towards the center of the dash.

  86. tibor kertesz :

    Date: February 17, 2014 @ 2:50 pm

    hello Dennis,
    The a/c temperature of my 1990 toyota corolla doesn`t work, the a/c is always full cold. My toyota hasn´t got a hot refrigerant hose going in to the cockpit, so I assume that what heat the a/c air is a resistor. Also my corolla hasn`t got a heater, it just blows cold, mid cold, and normal air. So what can it be? why my a/c is always cold?

  87. dennisb - Auto Tool Sales :

    Date: February 17, 2014 @ 3:43 pm

    Not sure there’s enough to go on. A repair shop should be able to help by looking at the car only a few minutes. With outside temperatures as low as they are in some places this time of year; it may feel like the AC is on all the time. You could also see car heater blowing cold article which may help. Good Luck.

  88. Cory :

    Date: February 20, 2014 @ 12:50 pm

    I have a 04 impala and while I was driving with me heat on it stopped working all of a sudden. Iwas wondering if you had any idea what it would be, it’s not a fuse and there’s nothing leaking. Need any more info feel free to ask

  89. dennisb - Auto Tool Sales :

    Date: February 20, 2014 @ 1:00 pm

    Cory, not enough to go on. Heat stopped working; Meaning it’s blowing cold air… If that’s the case, could be low coolant or air trapped in cooling system. But since you commented on our low airflow article instead of the Car Heater article maybe the blower is not working at all… This would most likely mean the blower motor failed. If this is what’s happening I would check for power at the blower motor. Good Luck.

  90. Dawn :

    Date: February 25, 2014 @ 11:20 am

    I have a 2003 Jeep Grand Cherokee and my issue is it takes a while for the hot air to start coming out through the center vents…but it comes out with almost no force…but if i put my hand over the vent it is hot. But I can hear a clicking underneath the glove box when i turn my climate control knob from hi to low setting.

  91. dennisb - Auto Tool Sales :

    Date: February 25, 2014 @ 11:58 am

    Dawn, clicking is usually an indication of an actuator that has failed. The actuator is like a little electric motor that opens and closes the doors that direct the airflow inside the plastic HVAC (Heating Ventilation and Air Conditioning) case. It’s also possible that there’s a broken door. See our article that covers more on these doors for the Grand Cherokee in particular since that’s what you have.

    Jeep Grand Cherokee HVAC Door Problem

  92. ali :

    Date: March 12, 2014 @ 4:27 am

    I have Toyota Mark 2 2003 and my problem is that when I turn on temperature control sometimes air flows from vents and I can also control the air speed but sometimes no air at all comes from vents. I have checked blower its working fine. I can also hear a ticking sound from dashboard. I have noticed one more thing that sometimes little air comes out from vents and stops while air conditioning is off.

  93. dennisb - Auto Tool Sales :

    Date: March 12, 2014 @ 7:17 am

    As far as some air flowing with the AC off, there’s probably just a little air getting past the closed airflow door. The doors in the case are never 100% air tight. The ticking is most likely a faulty door actuator/motor that controls the airflow direction to the different vents. Sometimes little plastic gears can get stripped inside the actuator, which results in the ticking noise and the inability of the actuator to move the door properly. I would follow the ticking noise to the bad actuator. Once it’s removed I would manually move the door it controls to make sure there’s no issues with the door itself. Then take the actuator to the dealer to get it matched up so the correct replacement can be purchased. Once the new actuator is installed the problem will most likely be solved. Good Luck.

  94. amanda :

    Date: March 16, 2014 @ 1:18 pm

    I have a 2009 Camry, and the ac only blows cold on the passenger side.

  95. dennisb - Auto Tool Sales :

    Date: March 16, 2014 @ 1:20 pm

    Amanda, if you have a dual zone system, there could be a bad door acuator/motor . Good Luck.

  96. Matt B. :

    Date: March 30, 2014 @ 10:04 pm

    I have a 01 Dodge Grand Caravan Sport in which the passenger side blows cold, but as you move to the driver side you get warmer air. From what I have read it sounds like a blend door problem. The AC also only seems to blow fresh air, as nothing changes when you push the button for recirculating air. What would be the cause for that? Thanks for your help.

  97. dennisb - Auto Tool Sales :

    Date: March 31, 2014 @ 7:14 am

    Matt, it’s possible to have a blend door issue with any vehicle, but with the Grand Caravan it’s NOT common. The most common cause of the problem you are describing is low refrigerant. Evaporators are the most common leak in your particular vehicle. So I would check the refrigerant reading first. When the system is fully charged you will likely have more consistent temperatures blowing out the vents on both sides. I would check the MAX/Recirculate door by accessing it behind the glove-box. See our AC gauge readings explained article for more information on readings and our AC Leak article on finding refrigerant leaks.

  98. randy h :

    Date: April 19, 2014 @ 9:53 pm

    I have an ’11 jeep liberty sport. my heater blows hot air like it should but in the wrong places, if i put the setting on floor which i prefer, it blows to defrost and barely any floor. main defrost setting works as does main upper/face setting. just seems cant get anything from the floor setting. i looked/heard the blend door actuator moving. actually went as far as taking the actuator apart to see if any broken gears which all was good. put back(still hear/see the motor moving)together and still have same situation. any ideas?

  99. dennisb - Auto Tool Sales :

    Date: April 20, 2014 @ 8:12 am

    When the actuator is removed I would manually move the door to see if the air flows out the floor vents like it should. If not the door may be broken. Good Luck.

  100. randy h :

    Date: April 27, 2014 @ 11:17 am

    ok it did throw a little bit of air out the floor vents but not much after doing what you said. any ideas how to get to where the act. doors are to see/fix if needed on this ride?

  101. dennisb - Auto Tool Sales :

    Date: April 27, 2014 @ 11:48 am

    If the door feels broken there’s no DIY fix. The dash has to come out and then the EVAP case. Once the case is out, it can be taken apart and the broken door replaced. It would be a good idea at this point to get an opinion from a shop that has the benefit of seeing the vehicle in person to verify the door is the problem. Good Luck.

  102. randy h :

    Date: April 28, 2014 @ 12:52 am

    OK so you’re saying there is no way to get just the evap case out or even have access to it without taking the dash apart/out? I am a do it yourself-er but never taken a dash completely apart/out.

  103. randy h :

    Date: April 28, 2014 @ 12:56 am

    I also wanted to add, with the actuator motor off, I didn’t really see any door. Just where the peg/gear fit into a hole/slot(assuming its the flapper door). But like I said, the piece does move in different positions (actually got my finger stuck up in there and had to pull out). So I don’t know if my finger was stuck in the door or what lol. Just know it hurt like you know what lol.

  104. dennisb - Auto Tool Sales :

    Date: April 28, 2014 @ 6:29 am

    That’s right. The dash has to come out and then the EVAP case. Once the case is out, it can be taken apart and the broken door replaced. But sounds like you’re not sure if you turned it because you just tried with your finger. I would use some sort of tool to turn it if I was unable to move it with my finger. Good Luck.

  105. randy h :

    Date: April 28, 2014 @ 10:01 pm

    ok man, thx for all of your prompt advice

  106. David :

    Date: May 28, 2014 @ 2:16 pm

    HI there. I have a 2004 Audi A6 with 130,000 miles. With hotter days we have noticed the 2 center air vents are not blowing air when the ac is on. Cold air is coming out of the side vents and the floor vents when we change the direction to the floor. The ac appears to be cooling but just no airflow from the center vents. Any ideas? approx cost to repair? Thanks for your help

  107. dennisb - Auto Tool Sales :

    Date: May 28, 2014 @ 2:27 pm

    Hi David, possibly an acutuator problem. I’m not aware of a common issue with the Audi. You would have to have it diagnosed before you can get an estimate on repair. Good Luck.

  108. jamie :

    Date: June 4, 2014 @ 3:28 pm

    I have a.2008 suzuki xl and my ac was fine until recently…when i need it most….now it barely blows the air and everyday.it is less cold. I bought the freeon thing with the gages but that did not help at all.

  109. dennisb - Auto Tool Sales :

    Date: June 4, 2014 @ 5:19 pm

    I would see what the gauge readings and go from there. AC not cooling isn’t Always “low freon”. You may have overcharged the system if it wasn’t low to begin with. See our AC gauge readings explained article for more information.

  110. David :

    Date: June 5, 2014 @ 9:43 pm

    04 Silverado blower sounds good but weak air on vents, looked around for cabin filter but didn’t find any removable door. So what’s my annoying problem. Seems like I got trash but can’t find a way to it. Thanks

  111. dennisb - Auto Tool Sales :

    Date: June 6, 2014 @ 9:00 am

    It may be possible to remove the blower motor and clean out leaves or any other debris. Good Luck.

  112. Melissa :

    Date: June 9, 2014 @ 10:33 am

    2011 Toyota Venza – A/C is blowing cold air; however, even at the highest setting, there is very little air flow from any of the vents. When adjusting the fan speed, I can hear the fan blowing harder as I increase the setting, but there is very little increase in interior air flow. Please help. Thank you!

  113. dennisb - Auto Tool Sales :

    Date: June 9, 2014 @ 11:30 am

    Most likely a very dirty and restricted cabin air filter which is located behind the glove box in your car. Good Luck.

  114. melissa :

    Date: June 15, 2014 @ 4:57 pm

    Hi, i have a 2003 acura tl-s. the a/c slows volume when i press brakes to come to a stop (but does not quit completely, just lowers in volume). still feels cold, even though minimal air blowing. does the same thing when i am turning left, even if i’m not pressing on the brake. however, it feels normal when i am driving pressing on gas, also when i turn right there is no difference. can you help direct me? thanks!

  115. alissa :

    Date: June 15, 2014 @ 10:13 pm

    Hi, I just bought an 05 Ford Explorer and my air does blow cold but only thru the back vents and the floor vents and the top vents like the defrost vents……also in the back of my explorer I hear a knocking noise, do you know what might be causing this?

  116. dennisb - Auto Tool Sales :

    Date: June 16, 2014 @ 8:13 am

    THe noise in the back is a bad actuator (door control motor). The problem in the from could be a mode actuator even though it’s not making noise. Good Luck.

  117. dennisb - Auto Tool Sales :

    Date: June 16, 2014 @ 8:16 am

    Lower RPM’s usually means less voltage from the alternator which in turn causes electric powered motors like the blower motor to spin a little slower. As far as turning left and right being different airflow… maybe there’s some water not draining and causing an airflow difference. Someone will need to check the car out in person to diagnose properly. Good Luck.

  118. LynnWhy :

    Date: June 16, 2014 @ 10:14 am

    Hello, having virtually no air flow in 2002 Acura TL. AC went out randomly one day. I first replaced resistor and blower motor. Blower motor runs, still no air flow. Replaced the cabin filters, still no air flow. replaced the air mix control motor, a very little improvement in air flow, but virtually no air flow. what else could I be missing? A/C was blowing strong and perfect before going out.

  119. dennisb - Auto Tool Sales :

    Date: June 16, 2014 @ 10:25 am

    Not sure why you replaced all those parts. The resistor most often fails, causing ONE speed not to work. If the blower fails it will stop turning completely. The mode door actuator (when removed) can be tested with a 9 volt battery by using a jumper wire and switching the polarity to test both directions. You can also work the door manually with the motor removed to make sure there’s not a broken door. My guess would be that there’s a door issue. At this point, it would be best to have a professional look into the issue that has the benefit of seeing the car first hand. Sorry I’m unable to diagnose for you. Good Luck.

  120. Patricia :

    Date: June 17, 2014 @ 9:39 am

    I have a 2003 Suburban and the issue i’m having trouble with the air conditioner. It blows cold air however, it is barely blowing out. It only works on 1 & 2 the really low numbers, it does not work at all on 3,4, & 5. It is also not blowing until I pick up speed at 45mph or above.

  121. dennisb - Auto Tool Sales :

    Date: June 17, 2014 @ 9:43 am

    I’d check the blower resistor (which is the most common cause of certain blower speeds not working) and pull the blower motor to look for leaves or other debris blocking the air flow through the evaporator. Good Luck.

  122. Jennifer :

    Date: June 17, 2014 @ 12:44 pm

    A/C
    Front and 3rd row vents work, but the 2nd row vents do not? When A/C is on the 3rd row vents also make a ticking sound the doesn’t stop when you turn the A/C off?

  123. dennisb - Auto Tool Sales :

    Date: June 17, 2014 @ 12:48 pm

    Moist likely a bad actuator…

  124. CRystal :

    Date: June 18, 2014 @ 1:53 pm

    I have a 2005 Yukon Denali and my AC will only blow cold when I’m driving over 50mph it blows cold but not fast. Now the system in the back works fine. Also sometimes it gets stuck and will only blow heat even if I turn off it continually blows low pressure hot air. Any suggestions

  125. dennisb - Auto Tool Sales :

    Date: June 18, 2014 @ 2:05 pm

    Maybe a problem with the blower speeds or a blocked dirty condenser. The intermittent problem may be an issue with the control head. A qualified auto tech with the benefit of checking it first hand and having much more information, should be able to tell you more. Good Luck

  126. jen :

    Date: June 24, 2014 @ 12:34 pm

    2003 Ford Expedition Eddie Bauer Edition

    When turning my steering wheel there is this grinding sound and a small amount of vibration in the front end (I cant tell if the vibration is in the steering wheel or the front end. It happens every time I come to a complete stop and go again. If I just have to slow down to turn a corner then it wont do it, but any other time while turning the steering wheel it will. I’ve looked to see if my tires were touching anything and couldn’t find anything. We changed the front brakes and thought it may stop after that but it hasn’t.

  127. dennisb - Auto Tool Sales :

    Date: June 24, 2014 @ 12:39 pm

    Jen, this article is on low airflow from the AC vents. I would check the brake hardware and wheel bearings. Also see our article on detecting noises in automobiles. Good Luck.

  128. Bryan :

    Date: June 25, 2014 @ 7:03 pm

    Hi, I have a 2003 Land Rover Discover the AC/heater blows and works in the 2nd and 3rd row seats but nothing for the front vents, you can kind of feel air when driving but for the most part no air comes out at all. Could it be something blocking the air or a hose not connected? Any help would be greatly appreciated as summer and the heat is coming fast!

    Cheers!

  129. dennisb - Auto Tool Sales :

    Date: June 25, 2014 @ 7:28 pm

    Most likely two blowers one for the front and one for the rear air. I’d check the front blower (could just be faulty) and go from there. Good Luck.

  130. yvette :

    Date: June 27, 2014 @ 1:43 am

    Hi
    I have a ford explorer 2005 and for some reason every morning after driving it theres a little bit of water coming out the back were smoke comes out but just in the mornings after warming up the car and driving it but it stops after, and after using the ac all day I parked the car and started leaking water under the car but it’s so hot and humid I can’t drive without the AC. Can u explain to me if that’s normal and I just took it out the dealership with everything new.

  131. dennisb - Auto Tool Sales :

    Date: June 27, 2014 @ 9:47 am

    A little water coming out of the exhaust is completely normal. There’s humidity in the air and also the catalytic converter produces some water (a by-product). After it warms up the moisture will be vaporized and you won’t see it. This has absolutely nothing to do with the AC. It’s normal for water to drip from the AC evaporator drain. The higher the humidity the more water will drip. Nothing to worry about…

  132. lorenzo :

    Date: June 27, 2014 @ 10:07 am

    Hi, I have a 2007 Chevy Tahoe and my front vents are not working at idle are slow speeds.It only works when I’m going about 30-40 mph. All other vents are working just fine just the ones in the front.

  133. dennisb - Auto Tool Sales :

    Date: June 27, 2014 @ 11:06 am

    I would check the front blower motor. The air you feel above 30 mph could be outside air entering the vehicle from the outside. Good luck.

  134. jen :

    Date: June 27, 2014 @ 2:42 pm

    If it was my wheel bearings wouldn’t the sound be constant? What about the front drive shaft going out?

  135. dennisb - Auto Tool Sales :

    Date: June 27, 2014 @ 3:17 pm

    No not necessarily. Normally on FWD vehicles unless the wheel bearings are so loose that the caliper bracket is being rubbed by the tilted brake rotor, the roaring noise of a worn bearing can be heard when driving at highway speeds especially when turning slightly one direction and then the other (while staying in the same lane). CV shafts typically make a clicking noise upon hard turns while accelerating.

  136. Curtis Weeks :

    Date: June 28, 2014 @ 12:53 am

    I have a 2012 Ford Fusion and tonight when I was at work I started my car and my a/c stopped blowing air period. There was no flow so I swapped to the defrost and there still no air flow.

  137. dennisb - Auto Tool Sales :

    Date: June 28, 2014 @ 8:26 am

    I’d check power (and ground) to the blower motor. Could just be a faulty blower motor. Sometimes you can tap on the motor to get it to temporarily work (for test purposes). Good Luck

  138. Jack :

    Date: June 30, 2014 @ 10:28 am

    I have a 2003 Jeep Liberty Sport. It blows somewhat cool air, but not cold and not nearly as cold as it used to. The air seems colder when the fan is on slower speeds like 1 or 2. Put it on 3 or 4 and it’s not as cold but does push more air. I’ve also noticed that the air is colder when it is cooler outside. It blows much colder air at night for example. I had it checked and the Freon is charged. Any help is much appreciated.

  139. dennisb - Auto Tool Sales :

    Date: June 30, 2014 @ 10:34 am

    Jack, it’s normal for the air to be colder when on low blower speeds and when it’s cooler outside (cooler ambient temps). I’d check the actual readings high and low. Check the vent temp and make sure MAX air is being achieved, which means the recirculate door is working. Good Luck.

  140. Chris :

    Date: July 4, 2014 @ 6:05 pm

    Hello, I have a 1998 honda crv and recently the ac won’t turn off, even when I have the controls set to off there is still air coming out of the vents even if the car is not moving, also the ac will not cool unless I have the controls set to maximum speed, is it the clutch relay or the controllers inside the car?

  141. Natalie :

    Date: July 4, 2014 @ 6:53 pm

    I have a problem with my Chevrolet Silverado 1500 2004 A/C. when I turn on my A/C hot air enters my cabin at the same time. The cold air from the drivers side turns hot and in the passenger side it keeps coming out cold. I really don’t know what is wrong with my car. can you help ? thankyou.

  142. dennisb - Auto Tool Sales :

    Date: July 5, 2014 @ 7:16 pm

    Possibly more than one issue. The clutch relay would only affect the AC compressor being engaged or disengaged, it would have nothing to do with the blower continuing when the controls are turned to off. This is not something anyone can diagnose without looking at the vehicle. Knowledge of the systems, electrical circuit diagrams and knowing how to read and pinpoint test will be necessary. I’d recommend taking it to a good tech in your area. Good Luck.

  143. dennisb - Auto Tool Sales :

    Date: July 5, 2014 @ 7:18 pm

    Possibly a control head issue or a bad actuator. Pinpoint testing by a qualified tech is necessary. Sorry I couldn’t be of more assistance.

  144. Jan :

    Date: July 5, 2014 @ 11:48 pm

    I have a 2006 ford explorer while driving heard a loud thud & A/C stopped blowing air through vents under the radio & by the doors.
    Thank you.

  145. dennisb - Auto Tool Sales :

    Date: July 6, 2014 @ 7:56 am

    Perhaps a door in the evaporator case came loose from the actuator (broke) and the thud was the door abruptly shutting? It’s going to take some looking at to determine the problem. A good AC tech should zero in on the issue quickly. Good Luck.

  146. Kenny :

    Date: July 7, 2014 @ 10:03 pm

    I have a 2003 town and country that I just replaced the ac compressor on. I put approximately 46oz of 134 in it. It is a 2 zone van system. It is blowing cold air out the front vents but not the back vents. I’m very confused as to why this is happening. the back does blow out air.

  147. dennisb - Auto Tool Sales :

    Date: July 8, 2014 @ 7:44 am

    Kenny, the dual zone system uses two different evaporators, therefore it has two different expansion valves which controls the flow of refrigerant to them. The rear expansion valve is obviously not working. Good Luck.

  148. wendy :

    Date: July 9, 2014 @ 5:14 pm

    Wow so much great info and advice here! I stumbled upon this because I just replaced both fans that were not working at all. Ac seemed to be working but not very cold. Earlier today all air flow stopped all together . A couple hours later it came back on and while driving I closed my drivers side vent. Then it all stopped again and didn’t come back. Does this sound like a motor failing?

  149. dennisb - Auto Tool Sales :

    Date: July 9, 2014 @ 6:18 pm

    Wendy, you said you replaced both motors, so it’s not likely a bad motor. Sounds like an intermittent connection possibly. I’d test for power and ground at the motor when the problem occurs. A wiring diagram and knowledge of how to read it may be necessary to do further testing. Good Luck.

  150. bali :

    Date: July 15, 2014 @ 3:34 am

    Dear please advise , I have 2006 Chevy Lumina. It’s air condition is working properly but when I make quick pick up or increase in engine RPM the blower cuts off and it takes in outside hot air.When I reduce RPM’s or speed up again slightly, it goes back to normal. What’s is the problem? Please advise.

  151. eric :

    Date: July 21, 2014 @ 10:02 pm

    I have a 1992 Toyota Corolla. The HVAC blower went out and I replaced it. Now when I turn the AC or vent on high the airflow is very weak. I’ve checked for obstructions and loose hoses and can’t find anything obvious. The motor I put in seems to be blowing at full speed. Any ideas

  152. dennisb - Auto Tool Sales :

    Date: July 22, 2014 @ 8:17 am

    Some aftermarket blowers are wired backwards. I’ve only ran into this one time, but it displayed the same issue as you’re having. Worth checking. Good Luck.

  153. Eric :

    Date: July 22, 2014 @ 9:34 am

    thanks for the prompt reply dennis. how would I check this and more importantly how would I reverse the wiring if that is the case? thanks again.

  154. dennisb - Auto Tool Sales :

    Date: July 22, 2014 @ 9:46 am

    Eric, there are only two wires that go to the blower.

  155. Elvin :

    Date: July 22, 2014 @ 9:16 pm

    I have a 2000 Toyota Echo and when I turn the ac on the car has low air flow from ac vents. I changed the cabin air filter and I checked everything and it still the same way.

  156. dennisb - Auto Tool Sales :

    Date: July 23, 2014 @ 7:38 am

    Elvin, as long as the blower sounds like it should and increases in sound when the blower speed is increased, I would probably remove the blower motor and clean any leaves that may be restricting airflow. Also check the Max (recirculate) door to make sure it’s working properly as well Good Luck.

  157. eric :

    Date: July 23, 2014 @ 8:18 am

    Dennis-you were correct! the new aftermarket fan was wired backwards… silly chinese! thanks so much for taking the time to share your wisdom!

  158. dennisb - Auto Tool Sales :

    Date: July 23, 2014 @ 8:42 am

    Hey Eric, glad I could help. Keep us in mind for your future tool needs.

  159. Marta :

    Date: July 24, 2014 @ 9:23 am

    I have a 2007 Camry XLE A/C was working fine, all of a sudden its now blowing warm air and there is a rattling sound coming from what seems to be the fan, like if its stuck or something. Any suggestions would help. Thank You.

  160. dennisb - Auto Tool Sales :

    Date: July 24, 2014 @ 9:39 am

    I would check the blower motor (if you’re talking about the fan for the passenger compartment). Perhaps it failed or something from the glovebox got sucked into the fan blower cage. After the air is blowing the AC gauge readings can be checked if needed. If you’re talking about the condenser/radiator fan, the electric motor may just need to be replaced. Good Luck.

  161. taylor :

    Date: July 26, 2014 @ 7:22 pm

    Welly A/V air flow is running low but it makes a loud noise as if it is blowing hard . My car does not have a cabin air filter tho. So I was wonderinng if that changes anything or narrows down any of the solutions?

  162. dennisb - Auto Tool Sales :

    Date: July 26, 2014 @ 7:48 pm

    Taylor, I’m not sure what a Welly A/V is. A quick Internet search only yielded model cars. But, on any car, if the blower makes noise, it is either failing or there’s debris like leaves or something like that obstructing the blower wheel. Since it has no cabin air filter rather large accumulations of leaves are possible, especially if you park under trees. I’d take the blower motor out and see if the blower cage and the case just needs to be cleaned or if the bearings may be starting to go bad. Good Luck.

  163. Ami :

    Date: July 26, 2014 @ 9:02 pm

    I bought a brand new 2014 Dodge Grand Caravan. The air conditioning will work fine at first then over time will stop working. You can still hear the fan blowing but no air comes out of the vents at all. Sometimes this happens when you turn your air down, eventually it will stop all together although it still sounds like it is running. Once the air has stopped flowing through the vents, you can turn the unit up or down and hear the blower running but no air coming out of the vents. The air conditioning will work fine the next time you start the vehicle.

  164. Bobbi :

    Date: July 26, 2014 @ 9:04 pm

    Hi!
    I found this sight while doing research into my problem and am very happy to ask a professional! I have a 1999 Dodge Caravan. My air-conditioning is working great, but starting yesterday, I noticed a HUGE amount o drainage under the front passengers side. I thought that it was coolant, but I didn’t seem to be too low on that, but filled it a little anyway. It did the same thing again(started gushing fluid in the same location) as soon as I parked today. It only happens as soon as I park and turn the engine of. Is it normal for the air-conditioner to produce what looks like a gallon or more of condensation? It also seems to be making a hissing noise, but has not overheated. Thanks!

  165. dennisb - Auto Tool Sales :

    Date: July 27, 2014 @ 8:04 am

    The water you see is condensation from when the air passes through the evaporator and the water out of the air collects on the fins. The temp change is a big part of why this happens. The more humidity in the air the more water you will see draining under the vehicle. Your drain could be starting to become clogged though, because normally it’s just a steady flow and not an all at once gush. Good Luck.

  166. dennisb - Auto Tool Sales :

    Date: July 27, 2014 @ 8:09 am

    The evaporator could be freezing up. Normally the water that collects on the evaporator drains off and drips under the vehicle out of the case drain. If the evaporator reaches 32 degrees for an extended period of time the water freezes. The ice will form a shield not allowing the air to blow normally, which could be the reason the air is blowing until next time you start the vehicle (the ice has time to melt). Your 2014 Dodge Caravan could be under warranty still. I’d take it back to the dealer and explain the issue so they can check the AC system for becoming too cold and freezing.

  167. dennisb - Auto Tool Sales :

    Date: July 27, 2014 @ 8:31 am

    I would check for power and ground to the rear blower motor. Good Luck.

  168. Paul Green :

    Date: July 27, 2014 @ 7:50 pm

    I have a 2001 Chevy Suburban and the rear air flow does not work how do I fix it or what do I look forward to fix it?

  169. nicole :

    Date: July 27, 2014 @ 8:35 pm

    I have a 2004 ford explorer and it seems like my a/c isn’t blowing hard enough it blows cold one of my center vents but the left middle vent and two outer vent you can’t feel unless your hand is up to it. Also my rear ac isn’t blowing as cold as the front. The motor in the rear was making a knocking noise few months ago but just stopped. I do I get my ac to blow harder. Please help

  170. dennisb - Auto Tool Sales :

    Date: July 28, 2014 @ 7:09 am

    Nicole, it’s easier to diagnose problems one at a time as problems arise. Now there are multiple issues that will take more time and effort, with hands on, to diagnose. I’d check the recirculate/max air door (like covered in our Explorer recirculate door repair article on), door actuator/motor operation etc. The knocking in the rear that was overlooked would have lead you directly to the bad actuator but now, it will be a little harder to pinpoint. I’d also check the refrigerant charge, however it’s common for a normally operating system’s rear AC to NOT cool as well as the front. The Freon has to travel further from the compressor, so the refrigerant loses some efficiency.

  171. Gina Davis :

    Date: July 29, 2014 @ 1:40 pm

    Hi I have a 2002 Honda Odyssey, it was purchased used in April and the front vents have not been blowing cold air at all. The rear vent air is slightly cool, but not cold. A few days ago the front stopped blowing all together, but the rear still worked, then this morning I discovered the front was working again. Any ideas? I have an AC recharge system, but do not want to use it if something else is wrong. Thanks for any help or ideas, my kids are so sweaty in the car!

  172. dennisb - Auto Tool Sales :

    Date: July 29, 2014 @ 1:45 pm

    The blower not working in the front could just the blower motor failing. I’d check the AC gauge readings after the front blower has been taken care of. Readings tell a story, without them it’s anyone’s guess…

  173. nas :

    Date: July 31, 2014 @ 1:54 am

    I have checked the GAS and its normal and there is no leak. My car is a 2007 model. The a/c blows cool air only if turn the fan to maximum speed. Also I noticed there is no cabin filter fixed. Is this blower problem?

  174. dennisb - Auto Tool Sales :

    Date: July 31, 2014 @ 7:22 am

    It would only be a blower issue if the blower motor only came on when on the high speed. Then I would suspect a blower resistor. From what you are saying, you hear the blower running and air is blowing on all blower speeds but is only blowing cool air when the blower speed is on the highest setting. This would lead me to think that maybe there’s a loose door inside the air distribution case that is affected (or moved) by the force of the air only when the blower is on the highest speed. If you hear the blower motor on all speeds but are not feeling much airflow the evaporator could be dirty and restricting the airflow. This would make sense, due to the fact that your cabin air filter is missing. Good Luck.

  175. ed :

    Date: August 1, 2014 @ 8:30 am

    I have a 2005 chevy Astro van. The ac works great off the bat. After an hour there is little or no air coming out. Can you help?

  176. dennisb - Auto Tool Sales :

    Date: August 1, 2014 @ 8:37 am

    If the compressor is still running (clutch engaged) the evaporator could be freezing up. Normally the water that collects on the evaporator drains off and drips under the vehicle. If the evaporator reaches 32 degrees for an extended period of time the water freezes. The ice will form a sheet not allowing the air to blown through. Good Luck.

  177. Yati :

    Date: August 1, 2014 @ 11:14 am

    Hello Dennis!

    I am From India. I have Fiat Punto, 2 years old.
    The issue is that when i am driving for long i see the ac blower pressure reduces after an hour or so. And when i switch the blower speed to 2 or full then after 2 mins the blower pressure comes back to normal. Other than that i am getting cold air but this issue is permanent since i bought my car & service guys have failed to rectify the issue.

    Can you help me in this?

  178. dennisb - Auto Tool Sales :

    Date: August 1, 2014 @ 11:34 am

    Hello Yati. It’s possible that the evaporator is getting too cold on the low setting. When you switch the blower speed to a higher speed the ice melts and the air blows through the vents normally again. This would be difficult to duplicate for the auto technicians, since the vehicle would need to be driven for a long time to get the problem to occur. Maybe you could suggest this possibility to the shop so they can make more of an effort to get the problem to occur. Good Luck.

  179. tg :

    Date: August 1, 2014 @ 4:15 pm

    Hi , i have a honda civic 2011. Since yesterday i have noticed that air flow has reduced. Air flow i used to get on 1st setting, now i have to turn the knob to 4th setting before i can get the same air flow. This is with or without the AC (just with the fan on). Also, i notice this irrespective of vent position (defrost or front).

    I took the cabin filter off and cleaned it. it had some leaves and dust (i changed it about an year ago) but did not make any difference.
    Any suggestions on next steps.

  180. dennisb - Auto Tool Sales :

    Date: August 1, 2014 @ 4:45 pm

    If the sound of the motor doesn’t change when the blower speed has been changed, there could be electrical issues. I’d make sure that it’s not something simple like the knob itself stripped before taking to a shop for further diagnosis. Good Luck.

  181. betty :

    Date: August 4, 2014 @ 1:00 pm

    My question is my air is cold but only comes out a little. It just barely blows. We put a new resistor in. You can hear that it wants to blow harder just doesn’t? Need help please!

  182. dennisb - Auto Tool Sales :

    Date: August 4, 2014 @ 3:44 pm

    Betty, normally the resistor failing would mean one or more of the speeds do not work at all and usually at least the high speed would work. As you’ve already found out your problem was not related to a faulty blower resistor. Some cars have cabin air filters (not sure what type of car you have). Sometimes the evaporator core can become very dirty and block air also. Those are a few things to check. Good Luck.

  183. smiley hdz :

    Date: August 8, 2014 @ 8:39 pm

    Hello I have a 2007 ford fusion and I notice that when its Cold or fresh outside the ac works grate but when its very hot outside it won’t blow cold air,what can be causing this problem of mine?

  184. dennisb - Auto Tool Sales :

    Date: August 8, 2014 @ 9:27 pm

    The most likely cause is low refrigerant. The system may not have enough Freon to operate sufficiently when it’s warmer outside. See our AC Gauge Readings Explained article for more information.

  185. nas :

    Date: August 9, 2014 @ 3:59 am

    Thanks for your reply. Now I have noticed that my car is blowing cold air when the car is idle or below 60 kmh. If I increase the speed then no cooling from AC, only normal air. What could be the issue?

  186. dennisb - Auto Tool Sales :

    Date: August 9, 2014 @ 9:09 am

    Nas, someone will need to check the doors in the air distribution case. Also, it’s normal for a car’s AC system to be off for one to a several seconds during WOT (Wide Open Throttle). Since you have multiple symptoms I’d recommend having a local technician check it out first hand. It’s difficult to speculate on each new sypmtom that’s provided a little at a time. Good Luck.

  187. MTT :

    Date: August 11, 2014 @ 12:14 pm

    We have a 2003 grand cherokee limited and the have just replaced the blower motor, blower motor resistor and the blend door motor and can not figure out why there is now no air coming out of the front vents in the jeep. all of the doors are fine…. does this sound like the wiring issue you have commented on? the air that you can feel out of the vents is cold – just not blowing….

  188. dennisb - Auto Tool Sales :

    Date: August 11, 2014 @ 1:04 pm

    Not sure what the reason was that you replaced all those parts, but if the air blew out the front vents previous to all the work being done, maybe the replacement blower motor is wired backwards. Good Luck.

  189. Guy :

    Date: August 16, 2014 @ 5:00 pm

    I have a 2003 Dodge Ram, the all doors are in working order, the fan is in working order on all speeds. I get cold air coming from vents but even when the fan is on high, hardly any air flow is coming from the vents. Can ya help me please?

  190. dennisb - Auto Tool Sales :

    Date: August 16, 2014 @ 7:33 pm

    Maybe the evaporator is very dirty resticting the airflow. There’s no cabin air filter. You may be able to remove the blower motor and clean the area between the blower and the evaporator. And maybe the evaporator fins as well. Good Luck.

  191. james :

    Date: August 16, 2014 @ 8:54 pm

    my 2005 chevy colorado a/c blower seems to not be blowing air out of the vents as strong as it use to ! how can this be fixed ? i dont think i have a cabin air filter so mabe the blower or resinator is going out or bad ?

  192. dennisb - Auto Tool Sales :

    Date: August 17, 2014 @ 9:40 am

    The blower resistor would be bad only if one or more of the speeds don’t work at all. It’s not likely that the blower motor is bad if you hear it running. Seldon do they just slow down. Since you don’t have a cabin filter that means the dirt can only collect on the evaporator fins. It’s possible that this accumulation has restricted some of the airflow. You may be able to remove the blower motor to access and clean some of the case and the evaporator. Good Luck.

  193. Joe a :

    Date: August 19, 2014 @ 3:42 am

    I have a 2007 Pontiac g6 and just tonight my ac won’t switch from defrost to any other mode plz help

  194. dennisb - Auto Tool Sales :

    Date: August 19, 2014 @ 8:53 am

    I’d check the mode actuator. Good Luck.

  195. Susan S :

    Date: August 19, 2014 @ 4:03 pm

    I have a 2002 Chevy Tahoe with a dual climate control system. I noticed off and on recently that I have had to bypass the “auto” setting for my AC in my SUV because it seemed very little air was pushing through the vents and it also didn’t seem as cold as it should have been no matter what temperature it was set on. I would cut the fan speed up and knock the temp down much lower than needed to give it a kick to get it going. Lately, that isn’t even helping much. Fans are full speed, temp is down to 66 and the air still isn’t pushing through the vents like it should. Now, two days ago, I have no airflow at all in the rear vents. Please help and thank you!!

  196. dennisb - Auto Tool Sales :

    Date: August 19, 2014 @ 4:51 pm

    I’d check the AC readings, cabin air filter if equiped, air distrution doors and actuator operation for the front AC. I’d check the rear blower motor since there’s no airflow at all. Good Luck.

  197. Katherine :

    Date: August 21, 2014 @ 4:41 pm

    My air works fine and it comes out cold but the air that comes out is very low like when I put it on the highest it feel like medium air

  198. dennisb - Auto Tool Sales :

    Date: August 21, 2014 @ 5:37 pm

    If the type of car you have (not sure what it is) may have a cabin air filter. It may be very dirty restricting the airflow. Good Luck.

  199. Austin :

    Date: August 22, 2014 @ 2:38 pm

    I have a 2007 Jeep Compass. My air conditioner is running but barely blowing (it is blowing cold/hot (depends on what I have it set to) but not much comes out of the vent, no matter the speed setting). Or it just doesn’t turn on at all. Sometimes if i leave it on long enough it will eventually kick on a work normally. Any ideas?

  200. Dewey :

    Date: August 22, 2014 @ 3:15 pm

    I have a 2010 Jeep Liberty,the air flow suddenly started blowing very low and stopped cooling today, not sure exactly what might be wrong.I checked the fuses but they are all good.

  201. dennisb - Auto Tool Sales :

    Date: August 22, 2014 @ 4:53 pm

    The blower motor might be bad. Sometimes you can tap on them when they are not running to get them to work temporarily. There could also be a bad connection. I’d try wiggling the blower motor harness that plugs into it. Good Luck.

  202. dennisb - Auto Tool Sales :

    Date: August 22, 2014 @ 4:56 pm

    Perhaps the eveaporator iced up and is blocking the airflow. Have to to check it to see. If it works again after it sits awhile with the engine off, that might mean the ice has melted aleviating the problem temporarily. Good Luck.

  203. Steve Hall :

    Date: August 24, 2014 @ 7:32 am

    I have a 1997 gmc Yukon the back vents blow cold and hard but my front it blows hard and the air is cold but air is barely coming out of all the vents in the front

  204. dennisb - Auto Tool Sales :

    Date: August 24, 2014 @ 8:02 am

    Most likely a dirty evaporator restricting the airflow. Good Luck.

  205. Shell :

    Date: August 26, 2014 @ 1:08 am

    I have a 2000 Grand Cherokee. My compressor to my a/c comes on an off. But my air isn’t cold.

  206. dennisb - Auto Tool Sales :

    Date: August 26, 2014 @ 6:48 am

    Thanks for commenting, but a repair article that is more closely related to your issue is – AC Gauge Readings Explained (be sure to see both pages. The second page has images of the AC gauges). You may have low refrigerant or some other problem. The first thing to do is check the AC gauge readings and go from there.

  207. Gerald Boswell :

    Date: August 27, 2014 @ 3:05 pm

    I have a 1995 Chevy Lumina with very low air flow out the dash vents. There are several relays attached to the duct and/or plastic housing under the dash. I can’t find any vacuum hoses that have vacuum on them out of the many vacuum hoses going to the A/C Duct. Is there a actuator for Regular or max A/C? If so which one controls the return for Max A/C?

  208. dennisb - Auto Tool Sales :

    Date: August 27, 2014 @ 7:01 pm

    Could just be a dirty evaporator core. When you put the AC on max or recirculate, you should hear a difference in the blower. The actuator that controls the max or recirculate will be directly behind the glovebox. Good Luck.

  209. Vanessa :

    Date: August 29, 2014 @ 7:53 pm

    I have a 98 Ford Explorer and after a busted radiator the air quit working on normal AC. Will work on max AC when in idle but dramatically decreases with driving.The normal AC now blows hot air only. I replaced the actuator motor and still had the problem. All Freon levels are good. I dropped the glove compartment and watched the door open for max AC and close on any other setting. Any suggestions on what to try or what it could be.Took to shop and they were going to charge me $900 to remove dash to find and fix the problem.

  210. Jeller :

    Date: August 30, 2014 @ 1:59 pm

    Dennis I have a 1999 Jeep grand Cherokee and my blower motor on high seems to slow down after running for a period of time and I have noticed at times that when I accelerate it will slow down and when I let off it speeds up. Then again maybe its my imagination :) however there is deffinitely a change in speeds and air flow. Looking around on forums for a similar problem and not really seeing anything that would direct me to the resistor. Thoughts?

  211. dennisb - Auto Tool Sales :

    Date: September 2, 2014 @ 9:06 am

    Jeller, it’s normal for some flucuation in the blower speed depending upon different electrical demands from other things on the vehicle, like AC compressor cycling on, headlights etc. The resistor would only be bad if at least one blower speed is inoperable. If you tap on the blower motor and it picks up speed it could be failing. Other than that it could be operating normally. Good Luck.

  212. dennisb - Auto Tool Sales :

    Date: September 2, 2014 @ 9:11 am

    Vanessa, sometimes an overheat condition with the engine, can cause some of the refrigerant to be released from the high pressure relief valve due to high pressures. I know you say the refrigerant levels are good (although you did not say what the actual readings are). But from what you have revealed, it seems to me the problem could be with the refrigerant level. So, I’d take a look at the readings on both high and low sides and go from there. Good Luck.

  213. Jason :

    Date: September 2, 2014 @ 10:15 pm

    My a/c went out before, and I fixed all the problems. But now it’s not working again. Cold air comes out (if you are traveling fast enough) but the fan isn’t working again. AND no cold air comes out if you switch it to Max a/c. Why??

  214. dennisb - Auto Tool Sales :

    Date: September 3, 2014 @ 7:14 am

    Could just be a bad electric blower motor that works the fan. I would first fix the blower motor issue and that will fix the problem. The only reason you’re getting any air movement at all (with the blower inoperable) is because some outside air is enetering, until you put the setting on MAX which recirculates the passenger compartment air. And without a blower working there’s just no air moving. Good Luck.

  215. Jenn :

    Date: September 9, 2014 @ 4:04 pm

    Hi, my husband and I are trying to figure out our car. We have a 1999 Mercury Mystique w/2.5L engine. Our problem is that when we turn on the vent or A/C nothing will come out unless it is on HIGH. We didn’t know if it was the switch that you turn the vent on low, medium, or high or if it is a bad blower resistor. We’ve both been looking at different sites and we think it might be a bad blower resistor but we would like your opinion please.

    We don’t want to put a lot of money out on a lot of parts and were hoping you would be able to help. Thank you for your time.

  216. dennisb - Auto Tool Sales :

    Date: September 9, 2014 @ 7:08 pm

    Not blowing on any speeds except for high usually means a bad blower resistor. Good Luck.

  217. Scott :

    Date: September 15, 2014 @ 10:40 am

    Good morning!!!
    I have a 2011 Dodge Ram 1500 with the long Horn Package (Hemi)
    My A/C works very well up front on all settings and so does the heat. My question is: There are two small floor vents in the back, lower part of the middle console. They do not emit any air at all. There is no movement regardless of the settings I work with up front. Is that due to a fuse or is this a challenge with restricted air flow? Thanks and I hope you are having a great day!!!!

  218. dennisb - Auto Tool Sales :

    Date: September 15, 2014 @ 10:55 am

    Scott, there could be a bad actuator. I’d look at a schematic to learn more. Good Luck.

  219. Lekisha Romero :

    Date: September 15, 2014 @ 1:38 pm

    I have a 06 Isuzu Ascender. The vents will not blow out air. Also, I started noticing an irritating sound when I’m parked and the AC is on high. One more thing, when I put the ac on different levels to blow 1,2,3 and 5 work but on 4 it won’t. Please help! Thanks

  220. dennisb - Auto Tool Sales :

    Date: September 15, 2014 @ 3:19 pm

    Lekisha, sounds like several issues. THe air not blowing out of the mid-level dash vents could be a bad actuator or door problem. The noise if coming from under the hood could be a belt or the compressor… NOt blowing on speed 4 is likely a bad blower resistor. Good Luck.

  221. Ron :

    Date: September 22, 2014 @ 9:21 pm

    Dennis, Thanks for the site with so much information. A month ago I purchased a 2011 Jeep Liberty with 50,000 miles on it. When we got the vehicle the temperature outside was around 105. The air would run at all speeds but didn’t seem to have a whole lot of flow for the sound of the motor to it. Never really felt that it was blowing enough air to me. Being in the triple digits outside and the black interior led me to believe that it might have been the problem. At night it seemed fine. I did notice a clicking noise when we moved it from cold to hot though which concerned me. The other day I got into it to go look at a field. The road was bad dusty out to the field. After leaving the field it worked as it had been working. Yesterday I got into the vehicle to go to town and the fan wouldn’t blow at all. I could hear a slight humming (for lack of better word) noise coming from the dash when I would turn the fan on. Thanks! Any insight is appreciated.

  222. dennisb - Auto Tool Sales :

    Date: September 23, 2014 @ 7:11 am

    Ron, I’d check to make sure there’s power and ground to the motor. If the fan motor is working there could be an obstruction blocking the airflow, maybe from the glovebox. Good Luck.

  223. Ron :

    Date: September 23, 2014 @ 7:50 am

    Thank you for the answer. Will the dash have to be pulled if the fan motor needs replacing and if so how many hours would that take? Also what could the clicking noise be when turning from cold to hot?
    Thanks again.

  224. dennisb - Auto Tool Sales :

    Date: September 23, 2014 @ 8:00 am

    Ron, the dash does not have to be removed to change the blower motor. It just unbolts from underneath dash behind glovebox. Should be less than an hour labor book time and actual time is less. Clicking could just be relays Good Luck.

  225. Michael :

    Date: October 1, 2014 @ 10:46 am

    I have a BMW X5 2008. The A/C air flow is low, and there is a broken piece in the back of the engine thats broke. My mechanic told me the piece that looks like a barrier prevents hot air from entering the cabin. What else could prevent the A/C from working properly.

  226. dennisb - Auto Tool Sales :

    Date: October 1, 2014 @ 12:58 pm

    Michael, sounds like the mechanic has checked it and found a problem. I would fix that and recheck the system. Read our AC articles for more information about other AC problems. There’s so many possible problems that it wouldn’t make sense to re-write them here unless I have more specific info to go on. Good Luck.

  227. john :

    Date: October 6, 2014 @ 8:28 pm

    Our vehicle constantly has hot air coming from the vents. Even if the temperature is turned up or down and the a/c on or off. What would make the hot air to continue? Also when the blower is off a small air flow continues.

  228. Macmac :

    Date: October 19, 2014 @ 3:13 am

    Hi Dennis,

    I am having a problem with my Range Rover Vogue 2004. The blower works fine, but when i drive for 30-40 minutes it goes slow. When i switched the blower higher, i can hear that its blowing air but only small amount of air is coming out from the vent. If i switched the AC off, the blower works normally. What could be the problem? thanks.

  229. dennisb - Auto Tool Sales :

    Date: October 19, 2014 @ 9:38 am

    The evaporator could be freezing up. Normally the water that collects on the evaporator drains off and drips under the vehicle out of the case drain. If the evaporator reaches 32 degrees for an extended period of time the water freezes. The ice will form a shield not allowing the air to blow normally. That’s why when you turn the AC off the blowere works properly. Good Luck.

  230. Macmac :

    Date: October 20, 2014 @ 6:22 am

    thanks.
    What are the possible solutions that i should consider – is there a need to replace the evaporator?

  231. dennisb - Auto Tool Sales :

    Date: October 20, 2014 @ 6:28 am

    If the evaporator is freezing up you may have a bad expansion valve or too much moisture in the system. Good Luck.

  232. chris :

    Date: October 29, 2014 @ 6:59 pm

    I had a new blower and resistor replaced and I’ve got restricted air flow. What else could it be?

  233. dennisb - Auto Tool Sales :

    Date: October 30, 2014 @ 12:03 pm

    Restricted cabin filter or evapoartor fins. Good Luck.

  234. jack nutt :

    Date: November 3, 2014 @ 11:02 pm

    I just purchased a 2002 Toyota Corolla LE, cabin air control for defroster floor and in your face adjustment does not change, no matter position of switch always plows in your face. Please help. Is it mechanical or electrical operated? Details to repair. I cannot find anything on the net that pertains to this problem. Thank you, J Nutt.

  235. dennisb - Auto Tool Sales :

    Date: November 4, 2014 @ 7:20 am

    Jack, the mode actuator is electrical, however there are mechanical components also. I would locate the actuator using a repair manual and see if it moves any when the position is changed with the controls. Maybe remove it and try working the cam by hand to see if the mode changes. It will take some diagnosing in person. So if you aren’t mechanically inclined it may be a job for the repair shop. Good Luck.

  236. Geri :

    Date: November 4, 2014 @ 1:02 pm

    Have a 2008 Ford Escape. The air flow only comes out of cabin vents won’t switch to defrost or floor. All four levels of blower works. Can you help me with what to look for. Thanks.

  237. dennisb - Auto Tool Sales :

    Date: November 4, 2014 @ 1:08 pm

    Geri, possibly the mode actuator. I would locate the actuator using a repair manual and see if it moves any when the position is changed with the controls. Maybe remove it and try working the cam by hand to see if the mode changes. It will take some diagnosing in person. So if you aren’t mechanically inclined it may be a job for the repair shop. Good Luck.

  238. Jason :

    Date: November 6, 2014 @ 6:41 pm

    Hi, I have a 2003 Jeep Grand Cherokee 4.0 that the evaporator is freezing up on. The evaporator probe is not getting any power to it. I supplied 5V of power to it, but it still doesn’t work.

    I believe the PCM controls the compressor cycling. I can’t find any wiring diagrams that includes the probe. Could this be the problem or should I look elsewhere?

  239. dennisb - Auto Tool Sales :

    Date: November 7, 2014 @ 10:22 am

    Jason the temperature probe works with resistance not power. Supplying power to this could damage the circuit since it doesn’t normally handle voltage of any amount. Typically the AC system on a Grand Cherokee that has an evaporator that freezes up, has a sticking expansion valve or a temp probe that is inaccurate. Good Luck.

  240. Bob :

    Date: November 14, 2014 @ 2:17 pm

    Dennis, We have a 2004 Explorer, and just changed out the blend door actuator, which was a pleasure, not! The air flow is still really weak coming from the vents, on A/C or Heat, just learned no cabin filter. What should I check next?

  241. dennisb - Auto Tool Sales :

    Date: November 14, 2014 @ 2:38 pm

    I’d pull the blower motor and check for leaves or other debris. Good Luck.

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