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Have a coleman evcon furnace model DGATO56BDD. blink code flashes 3 times with no diagram to know what the problem is. the furnace blows cool are instead of warm.

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  • mkiceman Oct 03, 2008

    My furnace is flashing three times and the diagram says the air combustion switch is stuck open. I called a furnace repair person and was told to shake the furnace to get the switch unstuck. It has worked in the past, however it is not working anymore, Help?

  • Anonymous Oct 16, 2008


    1. I have a Coleman Evcon # DGAT56BDD , Indicator light indicating centrifugal switch stuck open . Same problem last year, after several attempts over 3 days it started to working . Worked fine all winter

  • Anonymous Mar 31, 2014

    furnace will not light nor blow, red light on, green light blinking, remote on but unresponsive with new batteries.

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Your centrifical swith is stuck open on your blend motor. I found that removing the blend motor housing and spinning the stuck motor (from setting over the summer) will get you out of a bind ,.but you may end up needing this centrifical switch (locatedon the bottom of the blend/fresh air intake) motor replaced.

Posted on Nov 07, 2008

  • Chris Cunningham Sep 18, 2011

    Thanks so MUCH, morefords!! Your tip just saved me a pricey visit from my furnace repair guy.. I just took off the blending motor myself.. turned the motor a few times, and viola!! My furnace is once again running like a trooper!

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This problem usually is caused by the Inducer motor or combustion inducer blower failing to create negative pressure to close the switch... I would check to see if the motor is going bad before I put a pressure switch on. if the motor sticks at all it is going bad and will fail you on the coldest night!! then you'll wish you replaced it...
HVAC service tech
zac

Posted on Jan 21, 2011

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