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

    Apr 25, 2013, 10:25 AM
    Gas Wall heater with White-Rogers model#1E78-140 thermostat
    The thermostat hookup is 2-wire and there are 3 screw connectors inside the thermostat. I need to know how to connect the wires.
    drtom4444's Avatar
    drtom4444 Posts: 3,282, Reputation: 145
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    #2

    Apr 26, 2013, 04:21 AM
    How are the wires labeled? Take an ohm meter and find the two connections that open and close when the thermostat is moved from low to high and vice versa. The two connections that do this are the ones you want. If the screws are labeled "R," "W1," and "W2" then use "R" and "W1." "R" could also be labeled "C" or common, but that would be rare.
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