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    vintagelaser's Avatar
    vintagelaser Posts: 6, Reputation: 1
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    #1

    Apr 10, 2010, 10:50 AM
    a/c thermostat has no power
    My central thermostat(dizital) has no power
    vintagelaser's Avatar
    vintagelaser Posts: 6, Reputation: 1
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    #2

    Apr 10, 2010, 11:01 AM
    a/c thermostat has no power
    a/c thermostat has no power. There is no battery on the thermostat unit, what should I check? Can it be bad thermostat? Ut side breaker is been reset
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #3

    Apr 10, 2010, 12:36 PM

    If you have no power to the stat and now battrie then the furnace is not sending 24 volts to the stat.
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    vintagelaser Posts: 6, Reputation: 1
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    #4

    Apr 12, 2010, 10:09 AM

    Thanks, I took stst out from the wall and between Blue and red line reads 26 on the meter, it's that mean I am getting 24 volt from the furnace and can be a bad stat?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #5

    Apr 12, 2010, 03:53 PM

    Yes you have voltage to the stat. if blue is on c

    Put a jumper form r to g and see if the fan comes on
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    vintagelaser Posts: 6, Reputation: 1
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    #6

    Apr 12, 2010, 06:12 PM

    OK... thanks for your help. I will try that, what if fan comes on? That means the faulty stat?

    What if fan doesn't turn on?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #7

    Apr 12, 2010, 06:40 PM

    You can test r to g for fan
    R to w for heat
    R to y for cool

    If all works you need a new stat. if they do not work then you have other problems we will have to figure out
    vintagelaser's Avatar
    vintagelaser Posts: 6, Reputation: 1
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    #8

    Apr 12, 2010, 11:45 PM

    Thanks, I replace a stat and it worked. Thanks again
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