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Why is the car air conditioning compressor so loud?

2 Answers

DeJayce

07/28/25 11:58pm

There are several reasons why a car's air conditioning compressor may be particularly loud, including improper tension of the compressor drive belt and damage to the electromagnetic clutch. The compressor is the heart of the car's air conditioning refrigeration system, responsible for compressing and transporting refrigerant vapor. Improper tension of the compressor drive belt: If the compressor drive belt is too loose, the electromagnetic clutch is prone to slipping; if the belt is too tight, the load on the electromagnetic clutch increases. When the tension of the drive belt is incorrect, it can cause abnormal noise. In such cases, adjusting the belt tension may resolve the issue. Damage to the electromagnetic clutch: The compressor often operates under high load, shifting from low to high speeds, and the electromagnetic clutch is frequently exposed to rain and mud. When the bearings inside the electromagnetic clutch are damaged, abnormal noise occurs. In this situation, professional repair at a specialized maintenance shop is required.

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VonEverett

08/12/25 4:16am

I've been driving for many years and have encountered several instances where the air conditioning compressor was unusually loud. This could be due to wear and tear or aging of the compressor, where internal parts become loose and produce abnormal noises during operation. Sometimes, insufficient refrigerant causes the compressor to work under increased load, making the sound louder. Another common issue is a loose or worn-out belt, which can produce a hissing or popping sound when the air conditioning is turned on. When checking, I first listen to whether the sound is continuous or rhythmic. If it's continuously loud, it might indicate an internal fault; if there are unusual noises, it could be a belt problem. Don't wait for it to worsen—take it to a repair shop promptly to avoid affecting cooling performance or causing more significant damage. Regular maintenance of the air conditioning system, including periodic cleaning of the filter, can also help reduce such issues.

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