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What are the symptoms of a damaged car compressor?

2 Answers

GenevieveFitz

07/29/25 5:57pm

What are the characteristic symptoms of a damaged car compressor: 1. Air conditioning not cooling: When the AIC switch is turned on, the engine speed does not increase. If you don't use the air conditioning much, removing the compressor's belt can improve power by more than half a gear without any impact on the car. If the air conditioning compressor seizes, it will be scrapped. If it fails, it might be due to refrigerant contamination with water, causing incompressible liquid to enter the compressor and damage the piston. However, this is not commonly seen. Most compressor failures are mainly due to issues with the electromagnetic clutch. 2. Exhaust valve damage: In most cases, if the compressor's electromagnetic clutch coil burns out or the intake/exhaust valves are damaged, the compressor must be replaced. If only the electromagnetic clutch coil is burned out, it can be replaced separately. 3. Damaged air conditioning compressor: This can cause the air conditioning to stop working or cool poorly. The most obvious symptoms are the compressor not turning, making noise when turning, abnormal pressure, low high pressure, or high low pressure. 4. The air conditioning compressor does not operate on electricity: Instead, it is driven by the engine's gears or belt. When the air conditioning is off, the compressor idles.

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OVivienne

08/14/25 9:52am

When the car's compressor fails, there are a bunch of obvious symptoms. I've encountered this several times in my years of driving. The most annoying is when the AC suddenly stops cooling—you press the AC button, but the air blowing out feels warm, as if the AC isn't even on. Sometimes, it's accompanied by a screeching noise, like metal grinding or clanging, which is incredibly irritating while driving. I remember last summer when the compressor clutch had an issue, and the engine RPM even jerked unexpectedly, scaring me into pulling over to check. Even worse, if there's a leak in the system, you might notice a strange smell inside the car, and some smoke might appear around the compressor. These aren't minor issues—if ignored, fuel consumption can increase, and other parts like the belt or refrigerant lines could get damaged. My advice? Get it checked at a repair shop at the first sign of trouble to avoid baking in the heat on the road.

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