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

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The flame starts to fluter after 5 to 10 minuets and it trips the

I have a 15 year old propane 130,00 btu Coleman forced air, model #BGU13020, and after five to ten minuets the flame starts to shuter and it blows the heat sensor mounted on the cover to access the burner. My authorized repair person is telling me that either my heat exchanger, or the baffles in the housing are bad and that the furnace needs to be replaced. I have removed the burner and have inspected the inside of the exchanger and everthing in there seems to be solid and in tact. I have not looked any further, but after bypassing the sensor and letting it shutter for sometime it seems to me that the gas valve is the problem. The teck told me he checked the gas valve and all is well. My question is, where are the baffles located on my furnace and can they be causing the problem I am having, and how likly is the gas valve to be causing the problem, and how do I do a home test on it myself, also how difficult is it to inspect the baffles and how to go about it.Thank YouMyron Heitzman

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  • businessfirs Dec 26, 2008

    Can you email my response to, for some reason your system did not like the address, so I used my alternative one.

    Thank You


  • msgshtgn May 11, 2010

    If you have a high eff. furnace your technician is probably right, the main heat exchaner would look fine but the secondary is where your problem lies... look for soot in your condensate trap, or remove the combustion blower and look inside the condensate chamber at the baffels for blockage... if your unit has no condensate trap(doesnt drain water) then you have a mid eff.. and the only way to check forsure is to run the blower and use a match around the welds on the heat exchanger... if the flame blows out then you have a cracked heat exchanger and the unit needs to be replaced...( gas off while your doing this..)



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I'm guesing this is in a mobile home.this furnace is hard to see the really can't check baffles unless you get on the roof and pull cap and look down with flash light but that still doesnt tell much. have you checked to see if you have combustion air coming in to that room. if this is in a mobile home should be a flex pipe in ceiling or some times it comes from underneath make sure you have air from out side coming through. If this is a mobile home if you have alot of snow on roof this will cause the same problem you are having. i would check the flue and intake air first before i took furnace apart. Gas valve doesn't usually cause this problem. the repair guy is probally right but i would check the two thing i told you about first.

Posted on Jan 22, 2009


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