Bob and Tim are at a job where a technician from another company could not figure out the electrical, so he just put the panel back on the electrical compartment and left the job. It is a heat pump ...

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 ...

From gas leakage and faulty wiring to overheating compressors, several hidden issues may increase the risk of fire or even explosions. Here are the major warning signs, reasons behind AC blasts, and ...