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.

We finished last month's column on life cycle costs for water heating with a 50-gal. propane tank-type water heater (July, pg. 32). The reason behind this discussion is to explain why it made sense ...

In order to service and troubleshoot an air-source heat pump system, a service technician must understand the unit's sequence of operation. This is the order of events the system undergoes to cycle ...

Unspayed female dogs can have their first heat cycle anywhere between 6 and 15 months of age. During heat, which happens every six months or so and lasts a few weeks, your dog can get pregnant.

Derived from the Latin word fornax, meaning oven, a furnace is a large heating appliance designed to evenly distribute heat throughout a building. Furnaces accomplish this by burning fuel internally ...