What Causes Abnormal Noise in Car Fans?

1 Answers
HaleyFitz
07/28/25 2:42pm
Abnormal noise from the car's air conditioning fan is usually caused by the following reasons: 1. Unreplaced air filter: Different sounds inside the air duct are due to the long-term non-replacement of the air filter, leading to foreign objects like leaves in the duct; 2. Poor air conditioning heat dissipation: Inadequate heat dissipation or blocked pipes can cause abnormal noise from the compressor. High internal pressure in the compressor reduces its service life and should be addressed immediately; 3. Generator or air conditioning belt failure: Faulty bearings in the generator or air conditioning belt tensioner, or the tensioner losing its automatic belt adjustment function, can result in abnormal noise.
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