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Coleman DGAT Blend Air Wiring

Posted: Sun Jul 23, 2017 10:58 am
by finallyfarm
Installing new boards in Blend Air Deluxe II that is on a Coleman DGAT furnace. Wires from Blend Air to DGAT control unit were disconnected by serviceman. I connected Blend Air wires to screw terminals for thermostat on the DGAT control board with all colors matching except black (as shown in Blend Air installation instructions). The black wire I connected to the ā€œCā€ screw. System worked through first cycle of heat and same for air conditioning, but after first cycle the fan never shut off and DGAT control board led showed 5 or 6 flashes indicating gas valve on with no heat demand or reversed power polarity.