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

    Jul 24, 2009, 12:17 PM
    Contecting condenser to control card
    I have a GMP 100 furncace that I replaced the controller card this winter. At the time I did hook up the air conditioner. I have misplaced the installation instruction.

    The thermostat has 4 wires y g r w

    How do I connect the condenser to the thermostat?

    I not sure where to connect the second wire from the ac contact
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jul 24, 2009, 12:24 PM
    I think you are wanting to connect the tstat wires from the furace and runs to the condenser unit, am I correct (don`t know exactly what you are calling a controler card)
    If I`m understanding right you tie one wire to the yellow and the other wire to common
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