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-   -   Furnace only runs when thermostat is set at 90degrees (https://www.askmehelpdesk.com/showthread.php?t=619443)

  • Dec 13, 2011, 06:56 PM
    longhair
    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?
  • Dec 13, 2011, 07:29 PM
    ballengerb1
    Is this a round thermostat with a mercury bubble inside?
  • Dec 13, 2011, 09:56 PM
    longhair
    No, this is an electronic thermostat
  • Dec 14, 2011, 07:29 AM
    ballengerb1
    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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