What Causes Abnormal Noise in Car Compressors?

[DelEmiliano]

Here are the specific reasons for abnormal noise in car compressors: 1. Electromagnetic clutch contamination: Due to the proximity of the electromagnetic clutch to the ground, long-term driving can cause the clutch to accumulate dirt or mud, leading to internal bearing damage and resulting in abnormal noise. 2. Loose drive belt: The car air conditioning compressor has high operational requirements for the electromagnetic clutch. A loose drive belt increases the load on the electromagnetic clutch, making it prone to damage and, in severe cases, can cause the compressor to burn out. 3. Repeated engagement of the electromagnetic clutch: Frequent engagement of the electromagnetic clutch can lead to insufficient power generation by the alternator, causing inadequate working voltage for the compressor and resulting in abnormal noise. 4. Lack of lubricating oil: Insufficient lubricating oil inside the compressor. After prolonged use, the compressor should be appropriately lubricated to avoid noise or failure caused by friction.

[AxelAnn]

I've encountered compressor noise several times while driving, sounds like humming or squeaking, which is quite annoying. I think the most common causes are a loose or severely worn belt. When the belt is loose, the compressor operates unstably, causing noise. Also, the bearings inside the compressor might be damaged, and insufficient lubrication leads to excessive friction and strange noises. Additionally, insufficient refrigerant can cause pressure imbalance and weird sounds. I usually check the belt tension first; if it's loose, I adjust it or replace it with a new one. If the noise persists, then I need to inspect the refrigeration system. It's important to prevent foreign objects from entering the system and perform regular maintenance to avoid issues. Ignoring it for too long can make things worse; a broken compressor can render the entire AC system useless, making summer drives uncomfortably hot and repairs costly. Addressing it promptly ensures safety and saves money.