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    terry0911's Avatar
    terry0911 Posts: 1, Reputation: 1
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    #1

    May 11, 2009, 04:00 PM
    No power to Thermostat
    I have no power to my ac/heat digital stat, Ive replaced breakers and unit fuses, power noted to unit at fuses.. not sure what to test next... this happened after night of storms
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    May 11, 2009, 04:02 PM

    Check your control board in the bottom of your furnace. It may have a 3 amp car type fuse on it.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    May 11, 2009, 04:03 PM

    Check for a small 3amp fuse on the furnace control board. Please let us know what make of furnace you have.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #4

    May 11, 2009, 04:04 PM
    Guess were on the same page Josh, lol.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #5

    May 11, 2009, 04:08 PM

    Looks that way. I just typed faster. Lol
    AZTamez's Avatar
    AZTamez Posts: 2, Reputation: 1
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    #6

    Aug 26, 2009, 07:31 PM

    What does the fuse look like? I am experiencing the same issue. This may be my answer.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #7

    Aug 27, 2009, 04:09 PM
    Many times the fuse has blades that plug in like a automotive fuse style.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #8

    Aug 27, 2009, 05:43 PM

    And other times they have a cylinder glass fuse, either on the board, or inline between low voltage side of transformer and board.
    Pappy13's Avatar
    Pappy13 Posts: 9, Reputation: 1
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    #9

    Aug 27, 2009, 05:57 PM

    If you own a volt\ohm meter I would see if you have 24 volts from your transformer if the fuse is good. If not replace the transformer and remember to install a fuse if one is not already there, on the hot side of the transformers secondary voltage.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #10

    Aug 28, 2009, 07:36 PM
    Guys,, this question was posted May 11.., hope by now the problem is fixed
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #11

    Aug 28, 2009, 08:13 PM
    I also hope it has been fixed. Somehow these old posts keep coming back. LOL
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #12

    Aug 29, 2009, 03:44 PM

    Astamez posted on this thread on aug 27. He should have started his own thread, I don't know how to do this for him, so was just trying to help them out.

    Astamez, please start your own thread if problem isn't solved yet,, you will get more responses this way. Good luck. Lee.
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