What Causes Abnormal Noise When Turning the Car Air Conditioner to High Speed?

1 Answers
MacNora
07/29/25 10:39am
There may be several reasons for abnormal noise when turning the car air conditioner to high speed: 1. Dirty air filter: A dirty air filter can cause excessive noise and abnormal sounds. 2. Debris in the blower fan blades: Debris in the blower fan blades can lead to abnormal noise. You can check this by turning on the blower without starting the car to see if the noise appears. If it does, the issue is likely with the blower. 3. Fan issues: Deformed fan blades or a damaged fan motor in the car air conditioner. 4. Worn clutch bearing: A worn clutch bearing in the air conditioning pump can cause the engine noise to increase when the air conditioner is turned on. This component cannot be replaced separately and requires replacing the entire air conditioning pump assembly.
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