What Causes the Noise in a Car Air Conditioning Compressor?

[StTalia]

Introduction to the causes of noise in a car air conditioning compressor: 1. The compressor electromagnetic clutch is a common source of abnormal noise. The compressor frequently operates under high loads, transitioning from low to high speeds, placing high demands on the electromagnetic clutch. Additionally, the clutch is usually installed close to the ground, often exposed to rain and dirt. When the bearings inside the electromagnetic clutch are damaged, noise occurs. 2. The tension of the compressor drive belt also directly affects the lifespan of the electromagnetic clutch. If the belt is too loose, the clutch may slip; if too tight, the load on the clutch increases. Improper belt tension can lead to the compressor not working properly or even being damaged. If the compressor pulley and alternator pulley are not aligned, it can shorten the lifespan of the belt or compressor. 3. Repeated engagement of the electromagnetic clutch can also cause noise. For example, insufficient alternator output, excessive pressure in the air conditioning system, or high engine load can all lead to repeated clutch engagement. 4. The gap between the electromagnetic clutch and the compressor mounting surface. There should be a certain gap between the clutch and the compressor mounting surface. If the gap is too large, the impact increases; if too small, movement interference occurs when the clutch operates, which is another common cause of noise.