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

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Coleman 90% gas furnace control board stolen

Replaced board- furnace will lite ,just when the blower fan is about to start burners go out.Checked high limit-ok,checked flame sensor-ok(bypass w/jumpers)---Sometimes it will get to where the fan comes on and everything will run for about 4 min.s ,then valve will shut-off again--- Diagnostic code flashes constant after this---reads--twinning-24 volt out off phase

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  • lazgo Jan 20, 2009

    Thank you... problem was in the 120v...wire from brkbox had grd wire going into a terminal box ,but wires from trml box to furnace had none...replaced wires w/one that had ground ..Bingo success....New boards are more sensitive....

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Make sure high voltage wiring is correct

Posted on Jan 19, 2009

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