Why is there a strange noise when the air conditioner is on?
3 Answers
The reasons for strange noises when the air conditioner is on are as follows: From the radiator fan of the car's cooling system: When the car fan receives the command to turn on the air conditioner, it operates at high speed. Normally, it only works when the water temperature is high. However, after turning on the air conditioner, it needs to run continuously, which significantly increases the noise. If the fan becomes unbalanced due to dirt accumulation, the noise becomes even louder and is accompanied by body vibration. From the air conditioner blower: Noise can also occur when the blower motor bearings are worn or lack lubrication, usually producing a sharp sound. Another cause is not replacing the air filter in time, leading to dust accumulation and imbalance, which can also result in resonance and strange noises. From the noise of the air conditioner compressor belt: When the air conditioner is turned on, the compressor engages, increasing the load on the belt. If the belt is loose or worn, it will produce strange noises.
My car's air conditioning makes strange noises when turned on, sounding like squeaks and creaks. It could be an issue with the AC compressor, as compressors often produce humming or scraping sounds when running. From my experience, loose or aged belts are prone to making noise, especially in older vehicles. A belt that's too loose can cause system vibrations, resulting in squeaking sounds and even affecting cooling performance. Another possibility is worn compressor bearings, which need timely replacement. I recommend regularly checking the belt tension or having a professional technician test the compressor pressure. Don’t underestimate these noises—ignoring them could lead to belt breakage or compressor failure, potentially leaving you stranded on the road. Having a mechanic inspect the AC components during biannual maintenance can effectively prevent noise issues, saving you money and peace of mind.
The air conditioner makes strange noises when turned on, which gives me a headache. If the sound is like hissing or buzzing, it might be due to foreign objects stuck in the fan blades, such as small leaves or insects. I've personally seen things getting sucked into the AC system, causing the fan to spin unevenly. Cleaning the air intake or ducts should solve the problem. Another possibility is a faulty blower motor, which can produce noise when running unsteadily. I always use compressed air to clean the ducts. If the noise persists, it's best to take it to a repair shop. Avoid driving with the noise as it can distract you and increase the risk of accidents. Checking the blower or blades and replacing small parts usually costs just a few hundred dollars, preventing bigger issues.
