Very strange. Just woke up. It is probably 100 degrees in the room. The thermometer on the thermostat redlines at 86 so I am not sure. Hot air is blowing out of the vents. The air handler had switched to heat. The gas is on. Turn the thermostat off. Wait 10 minutes. Hot air still blowing. I think maybe this is haunted. Turn off the air handler by the on off switch next to it. The heat goes off. Our house is set up so that we have an air conditioner and a propane furnace. It seems to me that the only thing that could have happened is that the thermostat itself was broken. It was set to AC, the heat was on, the temperature was way over the set temperature, and yet it was still sending the signal to stay on. Not sure why when I turned the thermostat to off it was still blowing hot 10 minutes later. Has anyone ever encountered this before? I plan on replacing the thermostat tomorrow. (In a few hours)
Can you just disconnect the wires from the back of the thermostat? Maybe it is stuck on.
I could have tried that, but just flicking the furnace switch was easier.
Sounds like a bad thermostat - especially if it has to be in heating mode for the burner to work.
Mine is set up that way too. If I try to turn the heat on by raising the thermostat but the unit is in a/c mode, I’m pretty sure that nothing happens. But even if I’m wrong and it was possible for the burner to come on in a/c mode, when you shut it off it should have turned off.
I had a Lenox system before I had to get my new furnace. I had tried a Rite-Temp electronic thermostat with that system. It was defective out of the box. When I got the new furnace, I got a Honeywell electronic (programmable) thermostat and have had no problems at all.