How can I tell if my compressor pressure is normal?
How can I tell if my compressor pressure is normal? The readings on the a/c manifold gauges should show normal pressures at this point. While charging the system with refrigerant, monitor the variable voltage signal to the compressor. Some systems will display the compressor voltage/amperage applied on a scan tool. How can I diagnose a variable displacement compressor? Using a spray solution to check for leaks should be avoided because it can contaminate the service valves. Diagnosing variable displacement compressors is basically the same as with the old-style compressors. Check the refrigerant pressure first. If there’s sufficient pressure to run...