How to Check if a Car Compressor is Good or Bad?
2 Answers
Methods for checking the condition of a car compressor are as follows: 1. Checking the compressor's sealing performance. 1. Since refrigerant has strong permeability, the sealing performance of the compressor greatly affects the air conditioning system. 2. Method for checking the compressor's sealing performance: Use a manifold gauge to test. Connect the high and low-pressure hoses of the manifold gauge to the compressor's high and low-pressure service valves respectively. Start the engine and let it run at idle speed at 2000r/min. When the compressor is working normally, you can hear the metal sound of the piston movement inside the compressor. The normal working low-pressure reading is 0.15~0.20MPa, and the high-pressure reading is 1.42~1.47MPa. 2. Checking the compressor's operating condition: 1. Check if the drive belt is broken or loose. If the drive belt is too loose, it will slip, accelerate wear, and fail to transmit power. 2. Check if there is any noise inside the compressor.
To check if the car's compressor is working properly, with my years of car experience, I first start the engine and turn the air conditioning to maximum airflow. Listen carefully to the sound of the compressor—normally, it should produce a steady humming noise. If the noise is too loud or there's no sound at all, the compressor might be faulty. Then, feel the air coming out of the vents. If it's still blowing warm air after a few minutes and the cooling effect is poor, the compressor is likely malfunctioning. Next, check the engine compartment to see if the belt is tight and turning. If it's loose, it may slip, causing the compressor to stop working. Find a well-lit area to inspect the pipe connections for any oil stains or wetness—leaks of Freon often leave traces, which can be easily spotted with a simple check. Regular maintenance is crucial; inspect it seasonally each year to avoid costly repairs and ensure driving comfort.
