Suction pressure, head pressure, subcooling, superheat, Delta T. Taking all five of these calculations into account on every service call is critical. Even if further diagnostic tests must be done to ...

Let’s start with the basics. Water freezes at 32° F at sea level and atmospheric pressure. When any surface is below that temperature, and the air around it contains moisture, ice/frost will begin to ...

Since this column's inception, we've received a substantial number of questions concerning air-conditioning troubleshooting. Answering each one would take quite some time, but we will attempt to ...