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    rainforestosc's Avatar
    rainforestosc Posts: 3, Reputation: 1
    New Member

    Sep 18, 2007, 05:41 AM
    Heating and air conditioning
    My thermostat is blank and the batteries are not the problem. How do I check and identify the cause of the limit trips?
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member

    Sep 18, 2007, 03:19 PM
    You should check for power to the furnace or air handler, if you are sure you have power then you need to check the transformer and the fuse in the printed circuit board. You are not getting 24 volts to the thermostat if you are then you probably have a bad thermostat. Good luck < Mike

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