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  1. #1
    Join Date
    Aug 2011
    Location
    Ontario
    Posts
    381

    Goodman Res. furnace help

    Working on a Goodman Model # GMV90905 DXA. Powered up unit, called for heat and board immediately gave a 3 flash code. ( Low fire p.s. stuck open ) inducer never started switch should be open ?? Took off all stat wires and jumped w1 & r powered up again and got different code. 4 ( open H.L.) again inducer never started. All 5 limits are closed. No power out of board to inducer. Ordered new board and installed. Now I get nothing. No fault code. Have 24 v at r & w
    Inducer motor and ignitor check out o.k.

    Am I missing something or did I get a new bum board.
    There is no bad beer, some just taste better than others.

  2. #2
    Join Date
    Feb 2010
    Location
    Calgary, Alberta
    Posts
    1,103
    Check your jack plug into the board.
    Is 120v polarity correct and you have 24v from the transformer?

  3. #3
    Join Date
    Aug 2011
    Location
    Ontario
    Posts
    381
    All 3 jack plugs are tight and yes I have 24v from tx. polarity is correct.
    There is no bad beer, some just taste better than others.

  4. #4
    Join Date
    Feb 2010
    Location
    Calgary, Alberta
    Posts
    1,103
    Quote Originally Posted by talktowags View Post
    All 3 jack plugs are tight and yes I have 24v from tx. polarity is correct.
    It's not the plug itself, are the wires securely inserted into plug?
    It's very rare to see a DOA board, in my experience.
    Is it possible you have something shorting out or a wire worn through?
    Your meter should be able to sort this out, it will just take patience.

    I'd have another transformer ready, just in case.

  5. #5
    Join Date
    Aug 2011
    Location
    Ontario
    Posts
    381
    I am getting no power to the plug from the board. I put old board back in and I got my fault codes again. New board nothing. Will go at it again on Monday. Thanks for your input.
    There is no bad beer, some just taste better than others.

  6. #6
    Join Date
    Mar 2012
    Location
    New Hampshire
    Posts
    84
    Quote Originally Posted by syndicated View Post
    I'd have another transformer ready, just in case.
    Put a fuse inline, save the transformer.


    "I don't know why it be like it is, but it do"

  7. #7
    Join Date
    Oct 2012
    Location
    Corryton,TN
    Posts
    69
    Make sure the neutral hasn't come loos e in the disconnect

  8. #8
    Join Date
    May 2011
    Location
    Southern Indiana
    Posts
    30
    It sounds like the original problem was your circuit board. I ran into a bunch of Goodman units, two heating seasons ago, that were doing the same thing. Make sure you have your new board wired correctly. You may have sent 120v through the 24v side somehow and fried it.

  9. #9
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Quote Originally Posted by rivervalleytech View Post
    It sounds like the original problem was your circuit board. I ran into a bunch of Goodman units, two heating seasons ago, that were doing the same thing. Make sure you have your new board wired correctly. You may have sent 120v through the 24v side somehow and fried it.
    Second that. Check your wiring.

  10. #10
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,947
    Quote Originally Posted by rivervalleytech View Post
    It sounds like the original problem was your circuit board. I ran into a bunch of Goodman units, two heating seasons ago, that were doing the same thing. Make sure you have your new board wired correctly. You may have sent 120v through the 24v side somehow and fried it.
    I believe most anything is possible, but I just need a little explanation on how this could happen, when the power to most boards is feed to the board through a fitted molex connector.
    Thanks!
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  11. #11
    Join Date
    Dec 2011
    Location
    Twin Cities Minnesota
    Posts
    237
    You said the Inducer never ran..,jump to see if motor fried!

  12. #12
    Join Date
    Mar 2009
    Posts
    69
    see if you got power going to ventor motor

  13. #13
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,947
    Quote Originally Posted by Cosmicmuffin View Post
    You said the Inducer never ran..,jump to see if motor fried!
    Here.

    Quote Originally Posted by talktowags View Post
    I am getting no power to the plug from the board.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

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