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

    May 6, 2007, 01:24 PM
    How to jump a manual White-rogers thermostat
    Need to jump the thermostat to see if it is bad as the a/c unit does nothing -no-fan-no compressor-no hum
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
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    #2

    May 6, 2007, 06:17 PM
    What color wires do you have? If it's just a gas furnace and a/c you should have R,W,G,Y
    Just jump red and yellow together, but first disconnect them from the t-stat.
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
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    #3

    May 6, 2007, 07:36 PM
    OK. Well I would hook the thermostat back up. Does the furnace have power? If so make sure you have 24 volts at the thermostat by using a voltage meter and checking the red wire. Does anything else work? Can you get the fan to run in the "ON" position? Let me know and maybe I can walk you through some steps and figure this thing out
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