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    longhair's Avatar
    longhair Posts: 2, Reputation: 1
    New Member
     
    #1

    Dec 13, 2011, 06:56 PM
    Furnace only runs when thermostat is set at 90degrees
    Furnace will operate intermittantly when thermostat is set at 90 degrees will not operate when thermostat is set at a lower setting. Sometimes this does not work either. What are the possibilities for this problem?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #2

    Dec 13, 2011, 07:29 PM
    Is this a round thermostat with a mercury bubble inside?
    longhair's Avatar
    longhair Posts: 2, Reputation: 1
    New Member
     
    #3

    Dec 13, 2011, 09:56 PM
    No, this is an electronic thermostat
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #4

    Dec 14, 2011, 07:29 AM
    Sorry, I was hoping for a mercury switch that must be 100% level. Can you tell us brand and model of the tstat

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