Why is the Audi air conditioning so loud?

[LaMalachi]

Here are the reasons why the Audi air conditioning is loud: 1. Throttle valve dirty or stuck: After the air conditioning is turned on, the compressor will also start working. Since the compressor is driven by the engine, turning on the air conditioning 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 vibration and abnormal noises. This becomes more noticeable after the air conditioning 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, leading to increased gaps, while noise from the air conditioning pump bearings is primarily due to a lack of lubricating oil. If these issues are not addressed promptly, they can cause the air conditioning pump to burn out, rendering it unable to perform cooling. 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.