Furnace Not Working

Discussion in 'HVAC Heating & Cooling' started by JohnO, Apr 9, 2007.

  1. JohnO

    JohnO New Member

    Messages:
    16
    Location:
    New York
    I hear what I believe to be the circulator continuously running and the pilot light is on. However, I cannot get the furnace to run and I am not getting any heat. I know that the contacts are closed in each zone.

    There is a little (what looks like a) bleed valve and it is leaking a little hot water. The hot water in all the faucets is good.

    That is the only thing that I can see is wrong. I will try to get a photo.

    Any help in the interim would be appreciated. Thanks
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,139
    Location:
    New England
    John, circulators and zone valve imply a hot water boiler. Is that what you have?

    In a boiler, there are numerous safety monitors. Low pressure, high pressure, over temp, flame sensing, and more if it is a closed system like vacuum caused by the forced induction system. Any one of those safety interlocks could prevent the system from operating.

    If you are fairly handy and own either a test light or a multimeter, and can find the wiring diagram, you can isloate what is preventing the system from firing.
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