How to Fix the Clicking Sound from Car Air Conditioning Compressor?
3 Answers
Methods to fix the clicking sound from car air conditioning compressor: 1. Belt noise: If the noise is caused by the belt, simply replace it with a new one; if it's due to insufficient tension from the tensioner pulley, then the tensioner pulley needs to be replaced. 2. Damaged air conditioning compressor: Generally, when the air conditioning compressor is damaged, both 4S shops and repair shops only offer replacement repairs. 3. Debris in the air duct: Remove the air filter and check for any debris inside the air duct. If found, clean it out thoroughly.
I also encountered the issue of a rattling AC compressor last summer. While driving my family out for a trip, I noticed a rhythmic clicking sound coming from the engine compartment whenever the AC was turned on. Upon self-inspection, I found that the belt had aged and loosened, with visible cracks in the rubber. I went to an auto repair shop to replace the belt and had the bolts securing the compressor tightened. The noise disappeared immediately. Actually, the most common causes of rattling sounds are belt issues or loose installations. It's advisable to first open the engine hood to check the belt's condition, pressing it with your fingers to test its tension. If the belt is fine, then consider abnormal refrigerant pressure or a faulty compressor clutch. Remember to have the mechanic inspect the AC components during regular maintenance to avoid future troubles.
Last time my car's air conditioning made this noise, it was really annoying, especially the noticeable clicking sound at red lights. I tried troubleshooting it myself: first confirming if the noise only occurred when the AC was on, then listening near the compressor while the engine was running to locate the source. It turned out to be poor clutch engagement, and the mechanic mentioned that the electromagnetic coil tends to loosen after prolonged use. They replaced the clutch plate and also checked the refrigerant pressure, costing a total of over 400 yuan. Actually, worn internal bearings in the compressor can produce similar sounds, though it's less common. Avoiding prolonged idling with the AC on is a useful habit for protecting the compressor.
