If defrost isn’t working, something in the chain is broken. This step-by-step approach shows you exactly where to look and what to test.

In this month’s troubleshooting situation, the equipment is a four-ton heat pump, and the customer’s complaint is that the unit is blowing cool air. When you arrive, you confirm that the thermostat is ...

A heat pump doesn't generate heat; it transfers it from one place to another. It's an appliance with a bright future in an ...

Rebecca Brill is a writer whose essays have appeared in The Paris Review Daily, VICE, Literary Hub, and elsewhere. She runs the Susan Sontag's Diary and the Sylvia Plath's Food Diary accounts on ...