Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

we have a three zone baseboard hotwater furnace. a few months ago one zone would randomly stay on, we did change the thermostat we have not noticed the problem again, but in another zone we have the same problem, we changed the thermostat & it has not helped, the heat stays on no matter what temp we set it on, we have to shut the furnace off. please help.

share|improve this question
1  
You could have a mis-wired thermostat, or a bad zone valve. Have you tried it with the thermostat disconnected? –  TomG Jan 2 '12 at 20:39
    
yes, we took the thermostat off the wall & the heat was still on. –  candy Jan 3 '12 at 23:05
add comment

1 Answer

If you actually removed the thermostat from the wall, but the heat stayed on, more than likely the R wire is connected to the W wire somewhere in your system. Go to the furnace itself, and look at what is connected to the terminals on it. Try undoing terminals (one at a time!) until it stops, then continue troubleshooting from there.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.