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

    Mar 30, 2011, 04:39 AM
    Mother board on the outside unit has only 12 volts reading
    The inside heat white wire does not have any power coming from it.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Mar 31, 2011, 05:54 PM
    Not knowing what you have, no one can help. Not to sound mean, but you know the old saying. You need to help me help you. Make, model and serial # will help.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #3

    Apr 17, 2011, 08:06 AM
    More info about the system would be helpful (brand/model#/type/etc.). Does any part of the system function? If not, verify correct line voltage input & control transformer output. Try bypassing the circuit in question at the thermostat. If the thermostat is old, the selector switches may be worn & impeding voltage transmission.
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