What is the reason for the loud noise when the Audi A5 air conditioner is turned on?
1 Answers
The reasons for the loud noise when the Audi A5 air conditioner is turned on are as follows: 1. Dirty or stuck throttle valve: After the air conditioner is turned on, the compressor also starts working, and the compressor is driven by the engine. Therefore, turning on the air conditioner increases 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. The noise from the electromagnetic clutch is mainly caused by wear and tear, leading to increased clearance, while the noise from the air conditioning pump bearings is mainly due to insufficient lubrication. If these issues are not resolved in time, the air conditioning pump may burn out, making it unable 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 at best and damage the air conditioning compressor at worst.
