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What Causes the Squeaking Noise from the Car Air Conditioning Compressor Belt?

1 Answers

Michelle

07/30/25 6:48am

The electromagnetic clutch of the compressor is a common source of abnormal noise: The compressor frequently operates under high load conditions, transitioning from low to high speeds, which places high demands on the electromagnetic clutch. Additionally, the electromagnetic clutch is usually installed close to the ground and often comes into contact with rain and mud. When the bearings inside the electromagnetic clutch are damaged, abnormal noise occurs. The solution is to repair the bearings of the electromagnetic clutch. The tightness of the compressor drive belt also directly affects the lifespan of the electromagnetic clutch, leading to abnormal noise: 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 increases. Improper belt tightness can cause the compressor to stop working in mild cases or lead to compressor damage in severe cases. When the drive belt is operating, if the compressor pulley and the generator pulley are not aligned in the same plane, it can reduce the lifespan of the drive belt or the compressor. The solution is to adjust the tightness of the compressor drive belt.

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