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    prichert82's Avatar
    prichert82 Posts: 3, Reputation: 1
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    #1

    Nov 7, 2013, 01:20 PM
    I am only getting 15 volts at "W" on thermostat instead of 24, Please help.
    I have a Trane electric furnace and I am only getting 15 volts at W on the thermostat. Both Y & G are both getting 24 volts so I can only assume I am losing one leg of power on the W circuit. What I am not sure of is how to track it down so I can fix it. The heat will not come on. Both the cooling and the fan will come on if I switch the thermostat to cool or fan only. I have been into the air handler to investigate and was surprised not to find a circuit board inside. The unit is a 2010. Any help would be appreciated.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #2

    Nov 7, 2013, 08:49 PM
    Are you checking at the thermostat itself?
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    prichert82 Posts: 3, Reputation: 1
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    #3

    Nov 7, 2013, 08:55 PM
    Quote Originally Posted by Grady White View Post
    Are you checking at the thermostat itself?
    It is a digital thermostat, so the actual thermostat is removed, and I am taking the readings on the on the thermostat mounting plate.
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    Grady White Posts: 1,417, Reputation: 59
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    #4

    Nov 7, 2013, 09:09 PM
    You are measuring between R (red) and the other terminals?
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    prichert82 Posts: 3, Reputation: 1
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    #5

    Nov 7, 2013, 09:10 PM
    Quote Originally Posted by Grady White View Post
    You are measuring between R (red) and the other terminals?
    Yes
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    Grady White Posts: 1,417, Reputation: 59
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    #6

    Nov 8, 2013, 07:45 PM
    An open ciruit should give you a full 24 & a closed circuit should read zero. Sounds like a drain on the white wire somewhere. If there are any unused wires, swap one for the white on both ends. If you still get the same 15 volts, it would seem the drain is in the appliance.
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