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.

Article 440 applies to electrically driven air-conditioning (A/C) and refrigeration equipment. Each equipment manufacturer has the compressor motor built to its own specifications. The motors are ...