Why is the fan noise loud in Volkswagen cars?

1 Answers
DiMaya
07/30/25 3:11am
The reasons for loud fan noise in Volkswagen cars are as follows: 1. Abnormal noise in the air conditioning duct: The air filter has not been replaced for a long time, or there are foreign objects such as leaves in the duct. 2. Abnormal noise from the air conditioning compressor: Poor air conditioning heat dissipation or blocked pipelines can cause loud fan noise. When there is a lack of refrigerant, the internal piston of the compressor does not receive sufficient lubrication during operation, resulting in metal friction sounds under the high pressure of the refrigerant. Excessive internal pressure in the compressor reduces its service life and should be addressed immediately. 3. Engine malfunction: A faulty tensioner pulley bearing in the generator or air conditioning belt, or the loss of the tensioner's automatic belt adjustment function, can lead to loud fan noise.
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