What Causes the Abnormal Noise When Turning on the Air Conditioning?

1 Answers
McLily
07/30/25 2:01am
The reasons for abnormal noise when turning on the air conditioning are: 1. Damaged compressor belt tensioner pulley; 2. Excessive wear or damage to the blower motor; 3. Malfunction of the internal/external circulation motor; 4. High pressure in the air conditioning system; 5. Incomplete engagement of the compressor clutch; 6. Prolonged non-replacement of the air filter. Solutions for abnormal noise when turning on the air conditioning: 1. Clean the air conditioning vents promptly; 2. Remove the fan blades to add lubricating oil and clear any foreign objects; 3. Replace the blower motor with a new one; 4. Replace the air filter. The working principle of a car's air conditioning system involves the compressor inhaling low-temperature, low-pressure refrigerant gas from the evaporator outlet, compressing it into high-temperature, high-pressure gas, and then expelling it from the compressor.
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