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Sometimes the boiler doesn't turn on even
though the temperature is 2 Degrees under
thermostat setting (digital Honeywell) any ideas why this happens? Thanks, steam-one pipe system.


  • Jamie HallJamie Hall Posts: 10,661Member
    Battery thermostat? If so, are the batteries good? Then -- does the thermostat have a little indicator to say that it's calling for heat (most Honeywells do). If it's not calling for heat, then there may be a problem with the thermostat. If it is, time to check the boiler -- but what to check I cannot say without knowing a lot more about your system!

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • heatinghelpfor3heatinghelpfor3 Posts: 17Member
    I'll start with the battery, thanks for the advice
  • lchmblchmb Posts: 2,942Member
    It could be it's not set for steam. Check the instructions and make sure it's set up properly
  • LionA29LionA29 Posts: 254Member
    @heatinghelpfor3 check your " setup" instruction page like @Ichmb suggested. Good luck
  • KoanKoan Posts: 430Member
    Might be set up to cycle once per hour keeping it from firing
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