How does a tech know the a/c compressor he or she is diagnosing is actually failed and that the problem is not a crankcase heater, condenser fan, or rubbed out wire? According to the contractors The ...

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 ...

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 ...