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

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Furnace shuts off

I have a 4 year old furnace, my problem : the furnace shuts down after a while, and will not atart again ; it will start again maybe next day by itself, on the bord it hax the red lite blinking 3 times when the furnace does not work ; when works it has the red light on and a green-yelow light on at same time, a called 2, two specialist, and they could not figure out what is the peoblem . I dont want to buy another furnace, I need help to find out what is the problem? It is Winter and I have no heat!

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  • Scott Magill May 11, 2010

    Have you got your problem fixed yet if not reply back and i will give you a couple of things to try. Is this furnace a 90 or 80 % efficiency.What is the brand and model of the furnace.

  • msgshtgn May 11, 2010

    On most furnaces the flash pattern you are describing is a venting issue.. Either your vent is not properly sloped 1/4 inch per foot back towards unit , creating a trap that is collecting condensation from exhaust. or there is a blockage on the vents outside. Your intake pipe can frost up at night creating a blockage then melt in the morning eliminating the problem.. make sure the intake pipe and the exhaust pipe have the adequate distance from each other as specified in your service manual..

  • dwkcool May 11, 2010

    check on the back of the door panels and see if you can find the wiring diagram the flash code should be on it

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Defective combustion air switch. The 3 blinks are an error code. You didn't say, but I'm guessing you have a Coleman Evcon. They had alot of defective Combustion air switches. Your specialists were not that.

Posted on Dec 30, 2009

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I had the same problem with my Coleman Furnace,code 3 combustion air switch failed to close. It was not the switch,it was the booster motor cover, the head made the plastic cover brittle and it cracked causing an air leak.They should make this cover out of metal!

Posted on Nov 19, 2011

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