Why Is There Abnormal Noise When the Car Air Conditioning Starts?
2 Answers
Abnormal noise when the car air conditioning starts is usually caused by moisture in the refrigerant system or mechanical damage to the compressor. Here is a detailed analysis of the specific situations: 1. Moisture in the refrigerant system: If there is air or moisture in the refrigerant system, abnormal noise will occur when the refrigerant evaporates and expands, making the user perceive the sound as coming from inside the dashboard. 2. Mechanical damage to the compressor: External abnormal noise is typically from the air conditioning compressor. If the noise is located near the compressor, there is a high probability of internal mechanical damage. If the noise recurs after some time and is located inside the dashboard, it is more likely due to reduced efficiency of the dryer bottle.
Last time when I started the air conditioning, there was a squeaking sound. It turned out to be a loose belt. It could be due to belt aging or insufficient tension, causing slippage and noise during startup; or it might be dust or looseness on the fan blades, creating an unbalanced rotation and humming sound. Compressor failure is more serious, sounding like metal friction. It's recommended to carefully listen to the source of the sound when starting the air conditioning. If it's a belt or fan issue, tightening or cleaning should suffice. However, compressor problems require professional inspection and repair. My car that time just needed a new belt, costing 150 yuan to fix. Don't ignore it, as a broken air conditioner in hot summer affects driving comfort and safety. Regular maintenance of the air conditioning system can reduce the occurrence of abnormal noises.
