Erratic HVAC blower motor operation may be caused by a failed blower motor and/or blower motor resistor. Our technicians tell us that if the blower motor resistor fails the blower motor should be checked. If the blower motor fails its functional test in should be replaced along with the failed blower motor resistor.
Erratic Blower Motor Operation Due to Failed Resistor and/or Fan Motor on Mitsubishi Lancer Evolution
Average mileage: 107,000 (107,000–107,000)
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My AC works but the air is not blowing out of the vents on level 1,2 or 3. However when I put the blower on level 4 it blows but cuts off the AC. I checked with the dealership and it is a common problem requiring that the resistor be replaced.