What to Do When the Car Makes Buzzing Noises with AC On?

1 Answers
AdelynFitz
07/24/25 11:23pm
When the car makes a buzzing sound as soon as the AC is turned on, it may be due to the following reasons: 1. The air filter is dirty, causing excessive noise. 2. There are debris in the blower fan blades, leading to abnormal sounds. You can test this by turning on the blower without starting the engine to see if the noise appears. If it does, the issue is likely with the blower. 3. Deformed fan blades or a damaged fan motor in the car's AC system. 4. Worn clutch bearings inside the AC compressor may cause increased engine noise when the AC is on. This component cannot be replaced separately and requires replacing the entire AC compressor assembly. 5. Loose screws in the blower due to vibration. 6. The fan blades hitting other components. 7. Foreign objects in the air ducts. 8. Worn or damaged blower motor.
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