Why is the fan noise very loud when the Jetta's air conditioning is turned on?

1 Answers
LaFrancisco
07/30/25 10:19am
The specific reasons for abnormal noise when the Jetta's air conditioning is turned on are as follows: 1. Compressor electromagnetic clutch failure: Since the compressor often operates at high loads with speed variations from low to high, it places high demands on the electromagnetic clutch. The clutch is usually installed close to the ground and frequently exposed to rain and mud. When the bearing inside the electromagnetic clutch is damaged, it will cause noise. 2. Improper tightness of the compressor drive belt: Whether the compressor drive belt is too tight or too loose can affect the lifespan of the electromagnetic clutch. If the drive belt is too loose, the electromagnetic clutch is prone to slipping. If the drive belt is too tight, the load on the electromagnetic clutch will increase. 3. Lack of lubricating oil in the compressor: Improper use of lubricating oil may lead to compressor wear and scrapping.
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