What Causes the Car Air Conditioner to Be Too Noisy?

[Angelina]

There are several reasons why a car's air conditioner may be excessively noisy: 1. Dirty or stuck throttle valve: When the air conditioner is turned on, the compressor starts working, which is driven by the engine. This increases the engine's load, requiring the throttle valve to open wider to allow more air intake. If the throttle valve has carbon buildup or is stuck, it can cause engine vibration and unusual noises, which become more noticeable when the air conditioner is on. 2. Abnormal noise from the air conditioning pump: The main causes of noise from the air conditioning pump are issues with the electromagnetic clutch or the bearings inside the pump. Noise from the electromagnetic clutch is usually due to wear and tear, leading to increased gaps, while noise from the bearings is often caused by insufficient lubrication. If these issues are not addressed promptly, they can lead to the air conditioning pump burning out, rendering the cooling system inoperable. 3. Improper tension of the compressor drive belt: If the drive belt is too loose, the electromagnetic clutch may slip; if it's too tight, the load on the electromagnetic clutch increases. Improper belt tension can cause noise at best and damage the air conditioning compressor at worst.