What Causes the Abnormal Noise When the Car Air Conditioner is On?
3 Answers
The reasons for abnormal noise when the car air conditioner is on are: 1. Damage to the compressor belt tensioner; 2. Compressor malfunction; 3. Faulty internal and external circulation motor. Precautions for daily maintenance of the air conditioner include: 1. Regularly clean the air vents and dust and dirt in the cabin; 2. Check whether the liquid level height of the air conditioning system refrigerant is normal; 3. Check whether there are oil stains on the hoses and pipe joints of the air conditioning system; 4. Check whether the compressor belt is in good condition. The functions of the car air conditioner are: 1. Adjust the temperature, humidity, air cleanliness, and air flow in the car cabin; 2. Provide a comfortable riding environment for passengers, reduce travel fatigue, and create good working conditions for the driver.
As someone who has been repairing cars for many years, I often encounter issues with strange noises coming from the air conditioning. The most common problem is foreign objects in the blower, such as small items or dust that have fallen in, causing a buzzing sound. Alternatively, it could be an issue with the compressor, producing a squeaking noise when refrigerant is low. The noise becomes more noticeable while driving because vibrations amplify the sound. It's important not to ignore these sounds, as they could worsen over time. I recommend immediately checking the air conditioning filter and fan area to remove any debris. If the noise persists, it might be due to a loose belt or worn bearings, which would require replacing the parts. Regular maintenance of the air conditioning system can prevent such issues—for example, cleaning it once during seasonal changes. The cost is low, but it saves a lot of hassle. Addressing the problem early also makes driving safer and more comfortable.
When I notice abnormal noises from the air conditioning, I always check the fan speed first: if the noise increases with higher fan speed, it's likely due to dust accumulation jamming the fan; if the noise persists when reducing the fan speed, it might indicate a compressor malfunction. When hearing a whirring sound while driving, I immediately pull over to a safe spot and pop the hood to inspect if the belt has loosened or cracked from wear—road vibrations often accelerate this deterioration. I've developed a habit of replacing filters and cleaning out dust quarterly to prevent debris buildup that could amplify noise issues. Spending a little time on self-inspection or visiting a repair shop is straightforward, not only prolonging the AC's lifespan but also ensuring pleasant and worry-free journeys.
