What Causes the Sizzling Sound When the Car Air Conditioner is Turned On?

[LaCaroline]

When the car air conditioner is turned on, it may produce a squeaking sound, which could be due to a loose or slipping belt of the car air conditioner; or a malfunction in the car's compressor; or foreign objects inside the blower and ventilation ducts. If you are not familiar with disassembly and assembly steps, it is best to go to a 4S shop for repair. Solutions for the squeaking sound when the air conditioner is on: 1. Belt slipping: The air conditioner pulley and belt slip, producing a sharp friction sound during the slipping process. Check if there is oil on the belt. If oil causes the belt to slip, clean it thoroughly. If not, adjust the compressor's position bolt to tighten the belt, which can increase friction. 2. Belt too loose: If the belt is too loose and causes abnormal noise, you can press the belt's tension by hand. If it's too loose, tighten it. If the belt has been used for too long, it needs to be replaced. 3. Tensioner pulley damage: If the belt's tensioner pulley is damaged, it can also cause abnormal noise, requiring replacement of a new tensioner pulley. 4. Clutch slipping: Abnormal noise caused by the compressor clutch slipping or compressor bearings requires disassembly to check the cause. 5. Foreign objects in ventilation ducts: Foreign objects entering the blower and ventilation ducts can also produce abnormal noise, requiring cleaning of the blower and ventilation ducts.