What causes abnormal noise when the car's air conditioning is turned on?
2 Answers
Abnormal noise when the car's air conditioning is turned on is usually caused by a dirty air filter leading to excessive noise. It is recommended to clean the air filter. Below is relevant information about the function of the air filter: Ensuring the air filter fits tightly against the housing: Prevents the car windows from fogging up, ensuring clear visibility for drivers and passengers, and enhancing driving safety; Provides fresh air to the cabin, preventing occupants from inhaling harmful gases and ensuring driving safety; Effectively kills bacteria and eliminates odors. Effectively intercepts pollen: Maintains clean air in the cabin, preventing bacterial growth and creating a healthy environment; Effectively separates solid impurities such as dust, powder, and abrasive particles from the air; Effectively blocks pollen, ensuring that drivers and passengers do not experience allergic reactions that could affect driving safety.
When the air conditioning is turned on, the car makes abnormal noises, which may originate from different components within the AC system. Leaves, dust, or small insects can easily get stuck around the fan blades, causing scraping sounds when rotating, resembling rustling or whooshing noises. The AC compressor is a core component; if its bearings are worn or faulty, it may produce clicking or squeaking sounds. Once the compressor fails, replacing it can be costly. The belt system might also become loose or aged, leading to squeaky slipping sounds, especially noticeable when the AC is under heavy load. Unstable pipe connections can cause vibrations, resulting in clunking noises. Insufficient refrigerant or poor flow can also create gurgling sounds inside. I've encountered similar situations before—delaying repairs may lead to more significant damage. It's advisable to promptly clean debris near the fan vents. If the noise persists, visit a professional repair shop for inspection. Don't wait until the summer heat when repair costs are higher.
