old furnace won't kick off unless set at 80degrees

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  • cjhuff
    New Member
    • Jan 2007
    • 1

    #1

    old furnace won't kick off unless set at 80degrees

    rheem furnace 20 year old efficiency won't kick on and run unless set at
    80. If set at 70 or 75 will not kick on. Any suggestions on what might
    be wrong?
  • Java_Bob
    Handyman
    • Sep 2006
    • 168

    #2
    thermostat probably shot
    Is it beer thirty??

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