Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)
I have a Coleman Evcon downdraft mobile home furnace (modelDGAH077BBSA) that would not fire this morning. All the relays andsolonoids appear to be activating. The gas relay does open and when thesensor detects unburnt fuel it shuts down and purges the system, youcan smell the unburnt fuel at the chiminy. The system light then goesfrom steady to one blink every 2-3seconds.
The chances are that the furnace was running when the power went out. This will cause the high limit switch to cutout and needs to be manually reset.
You will find that switch in the blower compartment near the blower. Usually somewher near the highest point of the cabinet.
Push the little red button firmly till it clicks.
When the power goes out while the furnace is running the heat builds up because the blower shuts down immediately and causes this limit switch to cut out.
If you have a electric tester you can also follow the low voltage circuit till you find the open switch. Ther is usually a wiring schematic on the door cover of most furnaces.
I hope that this will help you to solve your problem!
Thanks for using Fixya!!
Posted on Dec 09, 2009
SOURCE: coleman furnace wont fire
Check inside the door panel next to the wiring schematic, you should find the diagnostic codes. Look up 7 blinks. This should narrow down the problem. ( It sounds like a bad hot surface ignitor).
Posted on Apr 10, 2009
If the unit fires but the main blower fan doesn't come on the the unit is shutting off on a temp high limit switch and it sounds like the problem is the main blower fan motor or control
Posted on Jan 18, 2010
I have had the same problem with mine for the last 2 years. Remove the motor on the side of the furnace(usually held on by 3 screws) and turn the fan blades inside by hand. after sitting all summer it seems to get stuck. If it moves freely, replace the motor and try to start it again. This fixed mine the last 2 years! Hope this helped.
Posted on Oct 04, 2010
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