What is the method to determine whether a compressor is good or bad?

1 Answers
Janice
07/30/25 5:23am
The method to determine whether a compressor is good or bad is: 1. Start the engine and maintain the speed at 1250 to 1500 rpm; 2. Connect the manifold pressure gauge set to the air conditioning refrigeration system, turn on the AC switch, and set the fan to the maximum position; 3. Touch the intake and exhaust ports of the compressor. If the intake port is cool and the exhaust port is hot, with a significant temperature difference between them, the compressor is good; otherwise, it is damaged. The working principle of an automotive compressor: It draws refrigerant from the low-pressure area, compresses it, and sends it to the high-pressure area for cooling and condensation. The heat is dissipated into the air through the radiator, and the refrigerant changes from a gaseous state to a liquid state, with increased pressure.
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