Coleman DGAT070BDE intermit. ign. fail - http://www.hvacmechanic.com/ Forums
Original message
| HVACRider
|  "Coleman DGAT070BDE intermit. ign. fail"
, posted Thu 28 Aug 23:32  
Got a 10 year old coleman mobile home furnace that intermittantly drops power to the gas valve as soon as the blower is given 120v from the circuit board. Thought that maybe the amp draw from the blower was robbing power from the transformer and causing the gas valve to drop out; but 24v stays present at the transformer even as the blower starts. Tried unplugging blower but problem still occured as 120v was switched to blower. Tried new circuit board, checked all electrical connections... anybody see this?
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Replies:
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| footprints
| "Re(1):Coleman DGAT070BDE intermit. ign. fail" , posted Fri 29 Aug 17:30
Hey, I'm just a home owner, but I had a similar problem and the hvac guys kept changing the ignitor, which seemed to work until they left. Try replacing the pressure switch. Mine has worked ever since...
Todd
Todd
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| | HVACRider
| "Re(2):Coleman DGAT070BDE intermit. ign. fail" , posted Fri 29 Aug 20:07
Thanks for the suggestion; this furnace has a centrifugal switch on the booster fan motor in place of a pressure switch.
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| | MechAcc
| "Re(3):Coleman DGAT070BDE intermit. ign. fail" , posted Sat 30 Aug 15:26:
Sounds more like a control board problem.
MechAcc
[this message was edited by MechAcc on Sat 30 Aug 15:28] |
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