A heat pump functions as a typical air conditioning system in the cooling mode — absorbing heat from indoors and rejecting it outdoors. In heating mode, the coils reverse their functions. The outdoor ...

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.

Air conditioning bills are spiking and as climate change starts to impact more parts of the country, air conditioners are running for longer periods. Now millions of Americans are starting to install ...