The gas furnace is an appliance looking like a large box that does the following:
- takes in cold air,
- cleans it with an air filter,
- heats it up with a gas burner using a stainless steel heat exchanger,
- distributes the warm air with a blower motor through your home's ductwork
The cold returning air enters back through the air filter into the furnace to complete another heating loop.
Sometimes there is a humidifier mounted on the furnace or the return air ductwork.
Furnaces come in different efficiencies measured in AFUE.
Once in a while things don't work quite right and you need to troubleshoot a gas furnace repair or relight a standing pilot if it has one. Most newer furnaces have electronic ignitions and need special troubleshooting.
Let's take a look at the more common problems and furnace repairs you may have to make.
