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Thread: Furnace Not Working

  1. #1
    DIY Junior Member JohnO's Avatar
    Join Date
    Nov 2006
    Location
    New York
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    16

    Default Furnace Not Working

    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. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
    Location
    New England
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    21,405

    Default

    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.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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