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

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.

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