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My coleman Evcon model DGATO70BDC 1994 starts up and then locks out. The pilot lights and then furnace runs for maybe 2-5 minutes and all that is still running is the air chamber fan. I am thinking of just replacing all parts that could be responsible the problem. There's not much there as probably you know. There is no circuit board just basic electronic ignition,relays thermo senors and etc.. Any help would greatly be appreciated. James

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Does your furnace have an air flow sensor? Blowing out the lowest tube will sometimes clear it and allow your furnace to operate. Lack of differential pressure across the burner will cause a lockout.

Posted on May 01, 2008

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22yooper
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SOURCE: Coleman Evcon model DGATO70BDC Starts to run then stops?

What you have is an ignition problem and your unit is shutting down on safety.

Posted on May 09, 2008

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1 Answer

Coleman Evcon model DLAS075ADC, glow plug lights, fire starts, then the blower comes on,..after ten minutes the whole system shuts down and will not re light, what is causing this?


Check to see if the pressure switch is sticking...it wont restart the furnace if it is already pulled in before the inducer motor is called to kick on.

Dec 17, 2013 | Air Conditioners

1 Answer

My furnace is a Coleman Evcon DGAT090BDD and it won't turn on at all. The green light is solid green, I can't find the pilot light, and its freezing in here. Please help me!!


Your furnace has an electronic ignitor so there is no pilot to lite...... I would shut power off to the furnace and then restart it....this will reset the control board and take it out of lock out..... If the hot surface doesn't glow after you restart it then it is probable burned out and will have to be replaced.....It is inside the furnace right behind the Gas Valve. Will have two wires running to it from the control board....If you can't get it goingby shuting off the power and reseting it then you many want to call your Service Company to have them check it out.....

May 05, 2011 | Air Conditioners

1 Answer

I have an Evcon hot surface ignition furnace and can not get the heat to come on .I set my thermostat on desired temp and starts running,but the blower wont come on,on auto I have to switch to the on...


Troubleshooting and Repair
Furnaces with electronic ignition systems may be much more efficient than their early counterparts, but they do it largely through electronics. However, there are still some troubleshooting you can do but fixing the problems can involve replacement of parts more so than repair or adjustment. PROBLEM: Furnace burner will not ignite
Possible Solution
  • With a Hot Surface Ignition (HSI) system, if a gas hissing sound is heard for about 7-10 seconds and the burners do not ignite, the furnace will go into lockout mode.
  • To reset turn the furnace power switch off and back on and try again. The switch is probably located on the side of the furnace. A reset button may also be found on the solid state controller. If resetting fails again, proceed as follows.
  • Turn off power and gas to the furnace
  • Remove and check hot surface igniter being careful not to touch the heat element. If it is cracked or damaged, replace the igniter.
      PROBLEM: Furnace comes on for 7-10 seconds then turns off Possible Solution:
      • Turn off power and gas to the furnace
      • Remove flame sensor from its bracket. Lightly clean the surface with fine emery cloth and replace.
      • The problem may also lie in a bad ground or the the black and white wires being reversed (reversed polarity) at the junction box or outlet powering the furnace.
      • The electronic ignition control module must ensure current flow through the flame sensor to ground and if the polarity is reversed in the circuit there is no voltage potential and the flame sensor does not work and closes the gas valve.
      • If the black and white wires are connected correctly and the flame still drops out, then the issue may be a bad ground. Using a volt-ohm meter, measure between the white wire and the ground wire to be sure you have no voltage.

Nov 01, 2010 | Air Conditioners

1 Answer

I have a EVCON furnace DGAT070BDC. I replace the igniter control, the gas valve and the thermostat. Same problem continues: glow stick works, then the pilot lights works.The igniter control clicks...


You may have a dirty/rusty burner that is clogged or your gas valve
manifold pressure setting may be too low. Normal manifold pressure
is 3.5 inches water column on natural gas furnaces. ( 1 psig is equivalent to 28 inches water column). Pull and clean burner. Also
check and clean pilot assy. including flame sensor (if present).
Please let me know.

Oct 24, 2009 | Coleman Air Conditioners

3 Answers

I have an coleman evcon furnace when i turn a/c on the outside unit will run but the inside wont run


put the just the fan on turn off the ac and the heat and just fan on make sure the blower motor works cause thats really the only thing you utilize from the furnace in the summer and let me know
then if so does your heat work fine

May 30, 2008 | Air Conditioners

1 Answer

Coleman Evcon model DGATO70BDC Starts to run then stops?


What you have is an ignition problem and your unit is shutting down on safety.

May 01, 2008 | Air Conditioners

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