R-410A has been the refrigerant of choice in residential and light commercial cooling systems since 2010, when federal government regulations mandated that new air conditioners and heat pumps could no ...

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.

Like any appliance, air conditioners need a little TLC to deliver optimal performance. ACs that haven’t been kept in top-notch condition tend to struggle most. We asked air conditioner pros and ...