The furnace is the hero of a house in winter. But there’s one tiny part inside it that most homeowners don’t even know exists, let alone realize they’re supposed to clean – the flame sensor. Left ...

If your gas furnace keeps cycling on and then turning off within a minute or so, it might be the result of a dirty flame sensor. Most gas furnaces have a small sensor designed to shut off the furnace ...

man with open furnace unit attempting to fix it while reading directions from a tablet - Gregorbister/Getty Images Whether you're wondering if you accidentally switched on air conditioning mode to ...

Keeping your furnace clean is important in order to have it run properly in winter (or year-round if you have whole-house air conditioning). A clean furnace will burn less fuel -- thus saving you ...