Why Is the Car Air Conditioning So Noisy?
1 Answers
There are several reasons why a car's air conditioning system may be noisy: 1. Excessive refrigerant charge: When the amount of refrigerant exceeds the standard level, the compressor's workload increases, leading to higher operational load. You can check the air conditioning inspection window - if liquid flows through with a few bubbles when the AC is on, the refrigerant level is normal. If there are no bubbles or very few, it indicates overcharging. 2. Compressor electromagnetic clutch issues: Abnormal noises may occur when the electromagnetic clutch's common position malfunctions. The compressor often operates at high speeds with low gear ratios under heavy loads, placing high demands on the electromagnetic clutch. Since the clutch's installation position is usually close to the ground, it frequently comes into contact with rainwater and mud, which can cause abnormal noises. The tightness of the drive belt also affects the electromagnetic clutch's lifespan. 3. Internal compressor damage: The compressor interior functions like a small engine. When internal damage occurs (similar to engine cylinder scoring), metal friction damage results. In such cases, when the AC is turned on, the compressor's internal components begin operating and produce loud noises accompanied by severe metal friction sounds.
