What Causes Abnormal Noise from the Compressor?
3 Answers
The reasons for abnormal noise from the compressor are: 1. Abnormal noise from the compressor electromagnetic clutch: The installation position of the electromagnetic clutch is usually close to the ground and often comes into contact with rainwater and mud. When the bearing of the electromagnetic clutch is damaged, it will produce abnormal noise; 2. Abnormal noise caused by 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. Precautions for repairing abnormal noise from the compressor: 1. Do not handle refrigerant in enclosed spaces or near open flames; 2. Avoid liquid refrigerant entering the eyes or splashing onto the skin; 3. Do not place refrigerant cans directly in hot water with temperatures above 40 degrees Celsius.
I've experienced the issue of abnormal noise from the air conditioning compressor, which sounded like metal grinding at the time. It took several attempts to figure it out. Typically, such noises originate from internal component wear in the compressor, such as aging bearings or piston wear, which happens after prolonged operation without timely maintenance. Another common cause is a loose or worn belt; when the air conditioning is turned on, the load increases, causing the belt to slip and make noise. Insufficient refrigerant or the presence of air bubbles can also lead to unstable compression and noise. Additionally, loose mounting bracket screws or electrical issues like a slipping electromagnetic clutch can cause continuous noise. I once tried checking the belt tension myself and saved some money; but if the noise persists or is accompanied by vibration, it's best not to delay and take it to a professional repair shop to avoid bigger expenses from a broken AC. Regular cleaning of the condenser during daily driving can also reduce the risk of abnormal noises.
As someone who has been paying attention to car maintenance for years, I believe there are several key reasons for compressor noise that need to be checked. First, it could be an internal mechanical failure, such as damaged bearing balls or insufficient lubrication causing noise. Second, the drive belt may be aged and loose, creating friction noise during acceleration. Third, issues with the refrigeration system, such as refrigerant leaks leading to unstable pressure, can cause abnormal compressor operation. Fourth, external factors like rusted and loose brackets or foreign objects getting stuck. I've found that ignoring these issues can increase fuel consumption and even burn out the entire air conditioning system. A simple self-check is to turn off the air conditioner and listen to the engine sound; if the noise disappears, it indicates a compressor problem. However, for complex situations like electrical circuit failures, professional tools must be used. I recommend checking the refrigerant level every season and avoiding high-load usage under high temperatures to extend its lifespan.
