Your car's air conditioning system uses several different fans to help keep you cool during the summer. Your interior blower performs a similar function to your home's air handler: it moves cold, dehumidified air away from the evaporator coil and into the cabin. It's easy to notice issues with your blower since you'll get inconsistent or weak air from your vents.
The air conditioning system also needs to transport warm away from the condenser coils, however.
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