What Causes Abnormal Noise in Car Air Conditioning Cooling?

[DeReid]

Here are the specific reasons for abnormal noise in car air conditioning cooling: 1. Throttle valve clogging or sticking: 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 increases the engine load, requiring the throttle valve to open wider to allow more air intake. When the throttle valve has carbon buildup or is stuck, it can cause engine vibration and abnormal noise. 2. Air conditioning pump noise: There are two main reasons for air conditioning pump noise—the electromagnetic clutch and the bearings inside the air conditioning pump. Noise from the electromagnetic clutch is mainly due to wear, which increases the gap, while noise from the air conditioning pump bearings is primarily caused by insufficient lubrication. If not addressed promptly, it can lead to the air conditioning pump burning out, rendering the cooling function inoperable. 3. Improper tension of the compressor drive belt: If the drive belt is too loose, the electromagnetic clutch is prone to slipping; if it's too tight, the load on the electromagnetic clutch increases. Improper drive belt tension can cause abnormal noise in mild cases and damage the air conditioning compressor in severe cases.