What Causes the Air Conditioner to Be Particularly Loud When the Car is Running?
3 Answers
The reason why the air conditioner is particularly loud when the car is running is due to abnormal noise from the air conditioning pump, dirty or stuck throttle valve, or improper tension of the compressor drive belt. Below is an introduction to the air conditioning system: Types of Air Conditioning: According to the control method, it is divided into: manual type (adjusting temperature, wind speed, and direction by toggling function keys on the control panel) and electro-pneumatic regulation (using a vacuum control mechanism, when the air conditioning function key is selected, it can automatically control temperature and air volume within a preset range). Air Conditioning Composition: Modern air conditioning systems consist of a refrigeration system, heating system, ventilation and air purification devices, and a control system.
The loud noise when the air conditioner is on could be related to several components. I think the most common issue is the fan section. If dust or small debris accumulates on the fan blades, it will make a clattering sound when rotating, especially in summer when the air conditioner is used frequently, making it easier for debris to build up. It could also be due to worn fan bearings or an aging fan motor, which increases noise. The compressor is another critical point; if it lacks lubrication or is under excessive load, it may make a clicking sound when starting up, which often happens in older cars. Loose belts should not be ignored either—the squealing sound is unmistakable. I recommend starting with a simple self-check: listen to where the noise is coming from when you turn it on. If it's from the fan area, try cleaning the grille with a vacuum cleaner. If the problem persists, it's best to take it to a professional shop for inspection—don't delay and risk affecting driving safety. Regular maintenance can prevent such issues, such as cleaning the condenser once a year.
The car air conditioning is making a lot of noise, and I suspect it's either the fan or the compressor. When the fan speed is too high, the noise naturally increases, especially when the max mode is turned on or the defrost position is selected, the noise will become significantly louder. Damaged fan blades or foreign objects stuck in the fan are also common issues; you can check around the grille yourself to see if there are any leaves blocking it. Insufficient lubrication in the compressor can cause a humming noise, which is more noticeable in hot weather. If the belt tension is insufficient, there may also be a squeaking sound, which is easy to overlook. Additionally, insufficient refrigerant can increase the system's load, making the noise louder, and in this case, the refrigerant needs to be replenished. It is recommended to check in advance, clean the fan area, and avoid minor issues turning into major ones. At the same time, the air conditioning system ages quickly, so daily use should involve gently pressing the accelerator to reduce the load and extend the lifespan of the components.
