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How to tell a harmless first-cold-day dust burn from a smell that means shut the furnace off, open a window, or leave the house entirely.
When a furnace lights, runs a few minutes and quits, a safety switch is almost always stopping it on purpose. The pattern tells you which one.
A condensing furnace is one of the few gas appliances in a house that needs its own drain. Here is what that plumbing does, why it clogs, and what shuts off when it does.
The small disc near your burners is a fire alarm, and it is telling you something about combustion that deserves a careful answer.
A safe check order for the simple causes outside the burner section, and the honest line where the homeowner stops and the technician starts.
The board runs the heating sequence and reports faults through a blinking light. Here is how to read what it is telling you, and when the board itself is the problem.
The first motor to run in every heating cycle, the one most homeowners have never heard of, and the one that quietly keeps combustion gases out of the house.
Three burner designs, two blower designs, one house. Here is what actually changes when you move up the ladder, and when you shouldn't bother.
The pressure switch is the messenger your furnace sends when the vent, the inducer or the condensate system is not behaving. Here is how to read the message.
Mike Haines unpacks how global supply shifts and refrigerant changes are affecting HVAC production, what delays mean for your next upgrade, and how to beat the bottleneck.
