What Causes the Sizzling Sound When the Car Air Conditioner is Turned On?
3 Answers
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.
I've heard this sound quite a few times. The sizzling noise is mostly a normal phenomenon caused by refrigerant flow in the air conditioning system. However, if the sound becomes louder or is accompanied by other abnormal noises, you should be cautious. Possible reasons include refrigerant leakage, blocked pipes, or compressor issues such as bearing wear. Ignoring it may lead to compressor damage, resulting in high repair costs. It's recommended to pay attention to the location of the sound while driving. If it's coming from the engine compartment, prioritize checking the compressor and whether the belt is loose or tight. Frequent use of the air conditioning in hot weather makes problems more likely to occur. It's best to go to a repair shop for a comprehensive check-up early on, rather than waiting until it completely fails. Preventive measures include regularly replacing the air conditioning filter and cleaning the condenser to keep the system clean.
I've experienced a hissing sound from the AC when driving my own car, which is really annoying. The cause is usually wear and tear on the blower motor or fan, creating this friction noise. It could also be due to a loose or slipping AC belt. Once, I replaced the motor and it became quiet, costing me little. If ignored, the motor might seize up, leading to reduced airflow or no cooling, making summer drives unbearably stuffy. I recommend starting with simple methods, like checking if the interior vents are blocked by foreign objects and cleaning the air ducts yourself. This has lower maintenance costs and can extend the lifespan of the components. From an economic perspective, fixing small issues is much cheaper than major repairs.
