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.

The compressor is the heart of any air conditioning or refrigeration system, so when it starts showing signs of not working correctly, technicians must act quickly in order to find out what is wrong.

Heat pumps have become a kind of Rorschach test for the future of home comfort: to some people they are a climate solution, ...