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

1 Answers
GavinRose
07/30/25 6:44am
Car air conditioner belt noise can be caused by the following reasons: 1. Check the belt tension: If the car belt is loose, it will produce a squeaking sound, and the belt tension needs to be adjusted promptly. 2. High pressure in the air conditioning system: When the air conditioner is turned on, the system pressure increases rapidly, requiring professional maintenance to check the pressure. 3. Air conditioner belt slippage: The belt may have quality issues or installation problems. Before installing the belt, the pulley should be cleaned. You can use a cloth or gloves to wipe the entire pulley, but avoid touching the new belt with oily hands, as contact with oil can cause oxidation and slippage. It is recommended to replace the belt at a professional auto repair shop.
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