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Steam furnace running when set to Off

Nyacker Member Posts: 1

I have a steam heat furnace that when it is set to off it still runs getting up to 75.  And when the temp is set to say 60 it will be 70 in the house.

Any ideas?


  • Tim McElwain
    Tim McElwain Member Posts: 4,625
    Is the thermostat

    a mercury bulb thermostat? If it is it may be out of level. Or it may be out of calibration.

    By the way it is not a furnace it is a boiler.
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