Why is the fan noise loud when the car air conditioner is turned on?
3 Answers
There are several main reasons why the fan noise is loud when the car air conditioner is turned on: 1. Deformation of the exhaust fan blades, damage to the exhaust fan motor, or excessive dirt inside the air conditioner, causing the fan blades to rotate less smoothly. In such cases, it may be necessary to replace the exhaust fan or clean the air conditioner. 2. Compressor bearing damage: When the air conditioner is turned on, the magnetic head and bearing engage and operate together, driving the internal workings of the compressor. This increases the noise when the compressor is under load. Generally, replacing the damaged parts will resolve the issue. 3. Additional information: A compressor is a type of driven fluid machinery that converts low-pressure gas into high-pressure gas and is the heart of the refrigeration system.
Recently, when I drive with the AC on, the fan noise is particularly loud, buzzing non-stop, which sounds very unpleasant. This situation is usually caused by issues with the fan blades, such as aging, deformation, or excessive dust buildup, leading to imbalance and noise during rotation. Sometimes, it's due to worn-out fan bearings, producing a clicking sound that makes it seem broken. If it's the blower fan inside the car, it might be because I rarely clean the vents, allowing dust to accumulate. Additionally, when the AC system fan speed is set higher to meet greater cooling demands, it naturally becomes louder. I recommend stopping the car first to check if there are any obstructions in the vents. You can gently clean them with a brush yourself, but if the noise continues to worsen, it's best to visit a repair shop promptly to avoid minor issues turning into major ones. Last time, my friend’s car had the same problem, and delaying the repair ended up costing a lot more when the fan failed.
When the car's air conditioning is turned on, the fan noise becomes loud. This is a common phenomenon I often encounter, especially when driving on highways in summer. When the air conditioning starts, the fan speed needs to increase to dissipate heat. If the temperature is set too low or the external heat load is high, the fan spins rapidly, naturally making more noise. Sometimes, it's due to the design of the fan blades, such as the blade shape not being suitable for high speeds, or dust accumulation causing imbalance and resonance. It could also be caused by aging fan motors, leading to unstable operation and humming sounds. I usually pay attention not to keep the fan at the highest speed all the time, and setting a moderate temperature can help alleviate the issue. It's recommended to regularly check and maintain the air conditioning system, such as cleaning the fan dust once a year.
