What Causes the Abnormal Noise from Car Air Vents?
3 Answers
If there is abnormal noise when the heater is on, it is most likely caused by foreign objects in the blower. If the noise occurs when the air conditioning is on, then it is highly possible that the compressor is faulty. Below is relevant information: 1. Introduction: Car air conditioning refers to the air conditioning device installed in a vehicle, which can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. 2. Structure: It generally includes a refrigeration device, heating device, and ventilation device. This combined system makes full use of the limited space inside the car, featuring a simple structure and easy operation, making it a popular modern car air conditioning system internationally.
After driving for so many years, it's quite common for the air conditioning vents to make noise, sounds like buzzing or clicking, mostly due to dust accumulation on the fan blades or small objects stuck, such as leaf fragments, sand, and other debris piled up on the fan causing friction during rotation. Sometimes it's the aging and wear of the blower motor, where loose bearings cause unstable rotation and noise, or it could be that the air filter hasn't been replaced for too long, causing blockage and poor airflow leading to strange noises. Checking is simple: first turn off the air conditioning, open the vent cover, and use a flashlight to see if there are any obvious foreign objects. If there are, just clean them yourself or use a fine brush to sweep them away. If the problem persists, go to a repair shop and let the mechanic check the motor or the air duct system to avoid minor issues turning into major faults, especially when driving long distances where strange noises can affect driving concentration.
When I first bought my car, I also encountered strange noises from the air vents. The clicking sound was really annoying, and I initially thought it was a serious issue. Later, a friend told me that it's often just small insects or dust accumulation on the fan causing the trouble. I remember that by removing the glove box, you can see the cabin air filter. If it's dirty, it might get clogged, causing changes in air pressure and resulting in noise. Replacing it with a new filter can solve the problem. It could also be that the fan blades are loose or there's a foreign object inside the air conditioning system, like debris left by mice crawling in when the car is parked. I suggest paying attention to cleanliness during regular maintenance. Doing it yourself can save some money, but if that doesn’t work, take your car to a professional repair shop for a thorough inspection of the air ducts and motor. Neglecting it for too long might lead to the entire air conditioning system failing, affecting your summer driving experience.
