What Causes the Noise When the Car Air Conditioner is On?

1 Answers
DeLorenzo
07/29/25 9:12pm
Possible reasons for loud fan noise when the car air conditioner is on: 1. Deformation of the blades in the air conditioner's exhaust fan. 2. Damage to the motor of the air conditioner's exhaust fan. 3. Excessive dirt inside the air conditioner; cleaning is recommended. Here are solutions to address noise inside the air conditioner: 1. A noise similar to flowing water heard from the glove box when the air conditioner is on. This is the sound of the air conditioner's expansion valve operating, which is normal. 2. Open the air filter cover under the glove compartment on the passenger side, cover it with a gauze bag, start the car, and set the fan to the highest speed to blow out debris. Alternatively, a repair shop can use high-pressure airflow to remove debris.
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