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 ...

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 ...

Last week, I waxed rhapsodic about why we wrench (the joy of solving problems, making choices, doing things our own way, controlling our world), and mentioned a few wiring-related things as examples.