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What are the causes of abnormal noise in car air conditioning systems?

1 Answers

LeHolden

07/30/25 1:54am

Car air conditioning system abnormal noises are caused by: 1. Excessive or insufficient refrigerant charge, creating flow noise when passing through the expansion valve; 2. Insufficient lubricating oil inside the compressor, causing friction noise due to inadequate lubrication; 3. Resonance sounds produced when the compressor operates at certain RPMs interacting with other components in the belt drive system. The functions of air conditioning are: 1. Filtering air entering the cabin; 2. Absorbing moisture from the air; 3. Maintaining clean air to prevent bacterial growth; 4. Preventing window fogging; 5. Regulating cabin temperature. Air conditioning maintenance methods include: 1. Regularly cleaning air vents; 2. Timely maintenance of the condenser; 3. Periodic cleaning or replacement of the cabin air filter.

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