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  1. #1
    Join Date
    Jan 2005
    Posts
    5

    Issue with Honeywell board ST9120C4057

    Anyone having issues with this board in an ICP furnace??


    Fan NOT coming on after 30-60 secs on a call for heat.....
    (blower does come on after 2 mins by main limit opening)

    Replaced the board, and even with the new one, still no 115 to neutral & heat tap! WTF?!

    Can't be a bad board (heat fan relay) out of the box, can it??
    Played w/ the dip switch settings... no blower, until limit opens.. Grrrrrrr!

    T-stat wires are off the board, Just R & W jumped out..



    I'm just going to put in a separate time delay relay & wire it up to the blower on a call for heat either 24v C+W or make & break continuity R+W, but still WTF?!!!!!!!

    Dare I try another board?????????????

  2. #2
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Quote Originally Posted by yo-el View Post
    Anyone having issues with this board in an ICP furnace??




    Can't be a bad board (heat fan relay) out of the box, can it??

    Dare I try another board?????????????
    I think you already answered your own question.

  3. #3
    Join Date
    Jan 2005
    Posts
    5
    Quote Originally Posted by the dangling wrangler View Post
    I think you already answered your own question.


    Normally I'd post: >>Haha..

    But trust me, I'm NOT laughing on this one...! uggggggggg

  4. #4
    Join Date
    Oct 2003
    Location
    Valdosta Ga
    Posts
    847
    What happens when R an G jumped out?

  5. #5
    Join Date
    Jan 2005
    Posts
    5
    Quote Originally Posted by bzzline View Post
    What happens when R an G jumped out?
    Blower runs (as normal call for fan is simulated..)

  6. #6
    Join Date
    Oct 2003
    Location
    Valdosta Ga
    Posts
    847
    My need some adult supervision or good directions for the board

  7. #7
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    6,959
    Wrong forum...

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