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New Member
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Sep 9, 2012, 12:21 PM
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Colmen Evcon Furnace Model # DGAH056BBSA
I have attempted resetting the furnace a few times, each time it lights for about two seconds and then goes out. It repeats the process two more times after that but only without igniting. Then the diagnostic light starts flashing and remains flashing until reset. I know because I sat there and watched for twenty minutes to see if I could get a pattern I could pick out, and no by the way I couldn't.
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Ultra Member
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Sep 10, 2012, 07:55 AM
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Is possible you have a bad flame senser
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Ultra Member
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Sep 10, 2012, 07:56 AM
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Originally Posted by wmproop
is possible you have a bad flame senser
It can be cleaned with fine sandpaper or steelwool
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New Member
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Sep 10, 2012, 08:20 AM
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Any idea on how to get to it?
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Ultra Member
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Sep 10, 2012, 09:58 AM
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Do you have a parts or info sheet on the unit, if so look it over the parts should be labeled,I` m not sure if a coleman has a flame senser, not knowing how old the furnace is
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New Member
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Sep 10, 2012, 11:14 AM
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Well the papers have copyright dates of 2001 and its under Red T products If that helps any. But I found the parts list, I'm not seeing anything for a flame sensor.
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Ultra Member
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Sep 11, 2012, 07:01 PM
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During the ignition sequence, can you see a glow through the small window above the burner?
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New Member
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Sep 12, 2012, 04:51 PM
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Yes I can.
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Ultra Member
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Sep 12, 2012, 05:56 PM
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Originally Posted by Fire6223
Yes I can.
I'm not sure but that furnace might use the ignitor as the flame sensor. Some do but some have a separate flame rod. Look on the control module to see if there is a wire connected to a terminal marked "sense" or "sensor". If there is such a wire, trace it to the other end. It should be a porcelain rod with bare metal rod sticking out the other end. Remove that rod, clean it with a scotch brite pad, reinstall & try the heater again.
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New Member
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Sep 12, 2012, 06:28 PM
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All right I'll try that. Thank you. I'll let know the conclusion or if there is. Lol
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New Member
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Sep 12, 2012, 06:33 PM
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All right I see a wire for a sensor rod. And says something about it having a "hot surface ignitor".
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Ultra Member
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Sep 14, 2012, 06:57 PM
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Originally Posted by Fire6223
Alright I see a wire for a sensor rod. And says something about it having a "hot surface ignitor".
There should be two terminals or a plug for the Hot Surface Ignitor (HSI) & a separate one for the sensor. Is this the case or not?
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New Member
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Sep 14, 2012, 07:34 PM
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There are two separate wires. The yellow wire leads the sensor rod.
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Ultra Member
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Sep 15, 2012, 07:46 AM
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Remove the sensor & clean the metal part which sticks into the flame with scotch brite, very fine sandpaper, or steel wool. Reinstall & try the furnace.
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New Member
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Sep 15, 2012, 08:04 AM
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So I got to remove the entire module? If so it looks like the pipes have been cemented in.
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Ultra Member
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Sep 16, 2012, 08:57 AM
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Originally Posted by Fire6223
So I gotta remove the entire module? If so it looks like the pipes have been cemented in.
No, not the module, maybe the burner, but they are super easy to remove. You may need a new burner flange gasket. I honestly don't remember what the burner assembly looks like on that particular furnace. A few pictures would be helpful.
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New Member
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Sep 19, 2012, 08:13 AM
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I wish I could post pictures Grady, but I'm doing this from my phone so the only I can do pictures is through email or something like that.
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Ultra Member
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Sep 19, 2012, 06:53 PM
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Originally Posted by Fire6223
I wish I could post pictures Grady, but I'm doing this from my phone so the only I can do pictures is through email or something like that.
Try tracing that sensor wire to the burner. You may be able to figure out how to remove the sensor. I did a search for your model number & found an installation manual but the pictures weren't much help.
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New Member
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Sep 19, 2012, 07:48 PM
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Yeah, I thought the same thing. I've followed the wire to just beside the module. I can't figure out how to get it out past that point without pulling everything. I don't want to end up pulling that wire out and end up breaking something.haha
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Ultra Member
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Sep 20, 2012, 03:45 PM
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Originally Posted by Fire6223
Yeah, I thought the same thing. I've followed the wire to just beside the module. I can't figure out how to get it out past that point without pulling everything. I don't want to end up pulling that wire out and end up breaking something.haha
Don't pull on that wire. Here is a link to the installation manual (with a parts diagram) http://homeappliance.manualsonline.com/manuals/mfg/york_a_johnson_controls_company/dgah056bbsa.html?idRes=15054123
Is the gas line piped with steel pipe or is there a flexible line? If piped with steel, there should be a shut off valve & union to aid in disconnecting the gas from the burner.
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