Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

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  • Anonymous Aug 28, 2008

    I have a 1997 MDL: DGATO70BDD, S#: 970228826 propane furnace, that will not come on. If I turn the thermo., to the desired temp., all I can hear in the furnace is some sort of humming noise. There is a blend air box, that has a steady green led and a red led, that flashes just once. But according to what I have read, that flashing red light has nothing to do directly with the furnace. I have looked for another light, but nothing. So....where do I begin to check? I live in MT. and winter is just a couple of steps away. Any help in getting me in the right direction, would be greatly appreciated.



  • Anonymous Jan 21, 2009

    my aut limit keep poping off


1 Answer

Turn power off to heater then watch operation. if it has a combustion blower motor it will come on, then after that next you should see the hot surface / or spark ignitor try to light pilot. Also on the door panel or controler you should be able to find out what it means when the light flashes three times. If you need more help then email at If i have more info on the heater i can help you more

Posted on Apr 14, 2008

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