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    JPP388's Avatar
    JPP388 Posts: 2, Reputation: 1
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    #1

    Feb 14, 2010, 07:55 PM
    SJC ( Tappan ) furnace no spark
    I have an 1979 SJC ( Tappan ) intermittent ignition power vent furnace which will not light the pilot.

    The inducer motor runs when the thermostat calls for heat, and I have 24 V at the R & W terminals on the transformer, but nothing at the gas valve.

    What should I check?

    Thanks!
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
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    #2

    Feb 14, 2010, 08:46 PM

    Does you furnace have a free standing pilot or is it lit by a hot survice ignitor or maybe by a spark ignitor.

    Let me know and maybe I can help you
    JPP388's Avatar
    JPP388 Posts: 2, Reputation: 1
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    #3

    Feb 14, 2010, 08:49 PM
    Quote Originally Posted by letmetellu View Post
    Does you furnace have a free standing pilot or is it lit by a hot survice ignitor or maybe by a spark ignitor.

    Let me know and maybe I can help you
    It does not have a standing pilot, it uses an intermittent spark, like an automobile spark plug.
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