In this troubleshooting situation you have responded to a complaint that a 4-ton package unit air conditioner is not cooling. When you arrive, you find that the indoor air handler is running, the ...

Compressor failure can be traced to a number of system issues, including high condensing pressures, refrigerant floodback, service or replacement issues, a loss of charge, liquid slugging, motor ...

Last month we discussed air-conditioning troubleshooting and how you can diagnose many of these problems yourself, including: • The need to have the old refrigerant reclaimed and the new refrigerant ...