My furnece is 20 years old and it heats my hole house well but it won’t turn off. I have to unplug it to turn it off. So do I need a new furnece or just a thermastat?
Does the furnace come back on when you plug it back in?
Most likely it is the first heat stage relay – bad sequencer that has broken in the on position. Get a pro; high voltage control wiring is not a DIY quick-fixit.
MiniFoxx
Formerly AJ-trucker’s wife
Some have better luck next time around,
some don’t, and some don’t even try.
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