What Are the Reasons for Abnormal Noises When the Car Air Conditioner Is On?
2 Answers
Reasons for abnormal noises when the car air conditioner is on: The car air conditioner's belt may be loose and slipping, or there may be a fault in the car's compressor. It could also be caused by foreign objects in the blower or ventilation ducts. Generally, if the noise is inside the car, it is likely a problem with the blower, while noises outside the car may indicate issues with the pulley or compressor. Below are some precautions for using the car air conditioner: 1. Regularly add refrigerant: The refrigerant used in car air conditioners is R134a, and it needs to be replenished periodically. Prolonged failure to add refrigerant can lead to reduced cooling efficiency and slower cooling speeds. 2. Regularly clean the car air conditioner: The air conditioning system can harbor many bacteria. When cleaning the air conditioner or adding refrigerant, always go to a professional institution and have experts use professional equipment for the operation.
I've encountered the issue of strange noises when turning on the car air conditioner several times. From my experience, the most common cause is debris like leaves or dust stuck in the blower fan. When the fan rotates, it creates friction noise, especially noticeable when using the external air circulation mode. Another possibility is a loose fan belt – in older cars, aged belts tend to slip and produce squeaking sounds. Compressor failures are also quite common, where worn bearings or internal component issues create a humming noise. Ignoring these sounds can worsen the problem, such as leading to higher replacement costs if the compressor fails completely. I recommend first trying to clean the air filter and ducts yourself, as this sometimes solves the issue. If the noise persists, promptly visit a professional repair shop for inspection – don't delay. Regular maintenance of the AC system is crucial to prevent minor issues from becoming major problems.
