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    Duegal23's Avatar
    Duegal23 Posts: 1, Reputation: 1
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    #1

    Jul 28, 2010, 04:04 AM
    How to connect compressor controls to a janitrol furnace which has only has three con
    Usually there are four wires (red,white,green and yellow)on the control terminal on a furnace. I came across this Janitrol Furnace which has only three terminal wires (red,white and green) no yellow. My question is how can I connect an AC Compressor controls (yellow and common) if there is only three wires one the furnace?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jul 28, 2010, 10:18 AM

    Tie your yellow wire from tstat directly to wire going to the condenser unit just make sure the second wire to/from condenser unit is tied to the common /blue on your circuit board, this way when the tstat is set to ac mode it will send signal to contactor to pull in
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