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doug238 is right but I always change out the bottom and top element. Remember to drain the water and don't dry start it... note

Thanks guys I will do this when I get down to North Carolina. Its my uncle house and they just got done doing the basement. And dman I should bought a new manometer but did it by eye cause I did this...

You can do that do if. But if your not scared to wired things. At the circuit board use a jumper on w1 and w2. Connect the humidifier to it w1 an commmon. Disconect w2 wire from the stat or board....

You should replace it anyway now there is a chromotherm 8 I believe now. Try getting the honeywell pro 8000 with a backplate to fit that. Or a new t stat good luck. It's the stat you need to buy...

It is normal listen to all the service techs out there telling you.. if it happen constant clean in put it in the dishwasher if possible.. good luck

Any service guys out there. I can't fiqure this one out. I just installed this 90plus furnace last yr barley used in a guest house in n.c. system ran fine never turned on just when needed for...

New ignitor

Replace the thermocouple that's all you have to do or clean it with sandpaper.

Try lighting the themocouple under 15secs, if it lights your good. If your holding it longer replace the thermocouple with a 36inch. Clean the pilot head might have slight soot build up. Somtime...