Causes and Solutions for Abnormal Noise in Car Air Conditioning Compressors
3 Answers
Causes and solutions for abnormal noise in car air conditioning compressors are as follows: 1. Electromagnetic clutch failure: Due to the electromagnetic clutch's proximity to the ground, long-term driving can cause it to become contaminated with sewage or mud, leading to internal bearing damage and resulting in abnormal noise. Replacing the compressor bearing can resolve this issue. 2. Loose compressor drive belt: The operation of the car air conditioning compressor places high demands on the electromagnetic clutch. A loose drive belt increases the load on the electromagnetic clutch, which can easily cause damage to the clutch and, in severe cases, lead to compressor burnout. Damaged internal parts can be replaced, or the entire assembly can be replaced. 3. Insufficient generator output: Repeated engagement of the electromagnetic clutch can cause insufficient generator output, leading to inadequate working voltage for the compressor and resulting in abnormal noise. 4. Excessive or insufficient clearance between the electromagnetic clutch and the compressor: Excessive clearance between the electromagnetic clutch and the compressor increases impact, while insufficient clearance causes interference, both of which can lead to abnormal noise. Inspect the clutch electromagnetic coil and adjust the clutch clearance as specified. 5. Lack of lubrication: Insufficient lubrication inside the compressor can cause abnormal noise due to friction. After prolonged use, appropriate lubrication should be added to prevent abnormal noise or compressor failure.
I've been driving for many years, and noisy AC compressors are quite common. There are usually several reasons: the belt is loose or worn and slips, making a squealing sound when turning; internal parts of the compressor are faulty, such as bearing wear or electromagnetic clutch failure, resulting in a rattling noise; or insufficient refrigerant, causing improper pressure and rough operation, which leads to a humming sound. As for solutions, first check if the belt is loose—if it is, just adjust it. If the compressor is broken, there's no way around it—you'll need to visit a professional shop for a replacement. If it's low on refrigerant, you'll need to top it up, but don't use the wrong type to avoid making things worse. Also, get into the habit of checking the AC system regularly, as routine maintenance can reduce issues, especially before summer use. In short, don't ignore strange noises—over time, the AC might stop working entirely, making driving miserable!
I've done some repair work before, and there are more than one or two reasons for abnormal noise from the air conditioning compressor: incorrect belt tension is the most common, as a loose belt can cause loud noise when rotating; issues with the compressor itself, such as internal wear or oil leakage from the shaft seal, could also be the culprit; refrigerant leakage reduces pressure, making the machine work harder and produce a groaning sound. To solve the problem, you need to take it step by step: first, turn off the air conditioning to locate the source of the noise, check the belt tension and adjust or replace it if necessary; if the compressor is severely damaged, it may need to be replaced entirely—find a reliable auto repair shop to handle it; also, inspect the pipe connections to prevent leaks and top up the refrigerant to the appropriate level. Don’t slack off in daily maintenance—keep the engine compartment clean, as excessive dust can wear out the belt faster. Regular vehicle inspections can help avoid these minor mishaps, making driving more worry-free and safer.
