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    rrsr330's Avatar
    rrsr330 Posts: 1, Reputation: 1
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    #1

    Nov 5, 2009, 05:32 PM
    Control board
    I have a gmp 075-3 I havea control board icm 280 and b1809913.The 280 everything comes on except the blower motor.the b1809913 everything comes on except the flame and the led blinks 4 times with the other board icm 280 solid led no blower motor go figure that out and there both new.anybody got an answer to this puzzel.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Nov 5, 2009, 05:47 PM
    Have you tried running the unit with the thermostat bypassed? Jumper "R" and "W" circuits together, either at the furnace or at the thermostat location. Post results.
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