Why is the car very noisy when the air conditioner is turned on?
1 Answers
It could be due to a dirty or stuck throttle valve; abnormal noise from the air conditioning pump; or improper tension of the compressor drive belt. Reasons for abnormal noise from the air conditioner: 1. Dirty or stuck throttle valve: After the air conditioner is turned on, the compressor will also start working, and the compressor is driven by the engine. Therefore, turning on the air conditioner will increase the engine load, which means the engine needs to increase the throttle opening to allow more air intake. When the throttle valve has carbon deposits or is stuck, it can cause engine shaking and abnormal noise. This becomes more noticeable after the air conditioner is turned on. 2. Abnormal noise from the air conditioning pump: There are two main reasons for abnormal noise from the air conditioning pump: the electromagnetic clutch and the bearings inside the air conditioning pump. Noise from the electromagnetic clutch is mainly caused by wear and increased gap, while noise from the air conditioning pump bearings is mainly due to insufficient lubrication. If these issues are not resolved promptly, they can lead to the air conditioning pump burning out and failing to perform cooling work. 3. Improper tension of the compressor drive belt: If the drive belt is too loose, the electromagnetic clutch is prone to slipping; if the drive belt is too tight, the load on the electromagnetic clutch will increase. Improper tension of the drive belt can cause abnormal noise in mild cases and damage the air conditioning compressor in severe cases.
