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    mfc9697's Avatar
    mfc9697 Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Feb 24, 2008, 12:01 PM
    No display on theremostat
    We came back from vacation & the thermostat is not displaying anything on the screen. We have check breaker & that is on. We took the face off the upstairs theremostat to see if it would work then & it did not. What could explain this?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 24, 2008, 12:04 PM
    Model and brand of thermostat?
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #3

    Feb 24, 2008, 12:05 PM
    Possibly a blown fuse on the printed circuit board in the furnace or air handler.
    mfc9697's Avatar
    mfc9697 Posts: 4, Reputation: 1
    New Member
    		  
    #4

    Feb 24, 2008, 12:06 PM
    Totaline P474-0100
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #5

    Feb 24, 2008, 01:07 PM
    See acetec post. It probably is the fuse. NOTE only replace with like same value
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