How To Diagnose A Bad Ac Compressor. Make sure all power is off and the service disconnect is pulled before attempting to test t. Fortunately we know exactly how to fix it the symptoms of a bad air conditioning compressor.
You will know you have a problem when you get hot air instead of cool air from the air conditioning system. If the suction pressure does not drop chances are the suction valves in the compressor are bad. Insufficient cooling among various other things is a key indicator that something is wrong in your cars air conditioning system.
The symptoms of a bad AC compressor are difficult to diagnose because they vary depending on the type of AC compressor and how long it has been failing.
The good news is. To check the suction valves in the compressor turn off the indoor blower motor and turn the unit on. A damaged or failing compressor will not be able to properly regulate the refrigerant flow in the AC system and as a result the AC will not function properly. You will need to find the signal wire connector that attaches to the compressor clutch.
