What Causes Abnormal Noises from the Air Conditioning?
1 Answers
Here are the specific reasons for abnormal noises from the car air conditioning: 1. Throttle valve dirty or stuck: After the air conditioning is turned on, the compressor also starts 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 noises. 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 caused by wear, leading to increased gaps, while noise from the air conditioning pump bearings is primarily due to insufficient lubrication. If these issues are not addressed promptly, the air conditioning pump may burn out, resulting in a loss of cooling function. 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 increases. Improper tension of the drive belt can cause abnormal noises at best and damage the air conditioning compressor at worst.
