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  1. #1
    Join Date
    Apr 2009
    Location
    massachusetts
    Posts
    60

    goodman 90+ intermit. locking out

    have a 6yr. old goodman 90+ locking out [1 flash ]
    m# gms90904cxs s#0409798428 cleaned sensor and
    replaced glow coil. the 1 flash on the panel is kind of vague,
    anyone come across this?

  2. #2
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,385
    Quote Originally Posted by burto View Post
    have a 6yr. old goodman 90+ locking out [1 flash ]
    m# gms90904cxs the 1 flash on the panel is kind of vague
    One flash is a lockout due to an excessive number of ignition retries. The possible causes are:


    Failure to establish flame.

    the cause may be no gas to burners, front cover pressure switch stuck open, bad igniter or igniter alignment, improper orifices, or coated/oxidized or improperly connected flame sensor.

    or

    Loss of flame after establishment.

    the cause may be interrupted gas supply, lazy burner flames (improper gas pressure or restriction in flue and/or combustion air piping), front cover pressure switch opening, or improper induced draft blower performance.

    It is just going to take researching each one to see if you can find the culprit.
    Instead of learning the tricks of the trade, learn the trade.

  3. #3
    Join Date
    Jan 2012
    Location
    Ashland Ky
    Posts
    19
    If it cant estabish a flame it may also be to no or a weak ground connection.

  4. #4
    Join Date
    Nov 2001
    Location
    east kansas
    Posts
    8,024
    May be dirty burners and the flame not crossing over all the way.
    Beware of advice given by some guy on the Internet.

  5. #5
    It is gas valve.

  6. #6
    Join Date
    Dec 2011
    Location
    bedford ind
    Posts
    1,088
    if it is propane, check for burp tube blockage

  7. #7
    Join Date
    Apr 2009
    Location
    massachusetts
    Posts
    60
    ended up putting one of the large white-rogers universal glow coils in
    and so far so good.

  8. #8
    Join Date
    Jan 2010
    Location
    over here
    Posts
    458
    Are the drain tubes on the same side as the collector trap? If they arent the furnace acts irratic and can throw different codes. see it all the time on new installs. just a thought.

  9. #9
    Join Date
    Jun 2000
    Location
    N. W., IN
    Posts
    1,017
    at 6 years it's likely time for a trap cleaning too.

  10. #10
    Join Date
    Apr 2009
    Location
    massachusetts
    Posts
    60
    jinxed myself, came back in tonite.
    will try all these suggestions tomorrow.

  11. #11
    Join Date
    Sep 2004
    Posts
    116
    Just posted about the same code. I had bad connections on gas valve. These things are always causing problems.

    Check everything twice. I've had to add a second flame sensor to keep some of the goodman equipment running.

  12. #12
    Join Date
    Jul 2009
    Location
    Northern area between Alantic and Pacific
    Posts
    107
    Check your gas pressure,burners,flame sensor,ground circuit,circuit board.....

  13. #13
    Join Date
    Jul 2010
    Posts
    19
    Quote Originally Posted by JJDH View Post
    Are the drain tubes on the same side as the collector trap? If they arent the furnace acts irratic and can throw different codes. see it all the time on new installs. just a thought.
    Good point for people not to familiar with amana/goodman. Also check to see if the fitting in the exhaust 90 (off the I.D. Motor) is plugged. Is the furnace sloped properly? OHM out the pressure switch to see if the contacts are dirty.

    If the ignitor was working before I don't think you've found the problem yet (could be wrong). Other then dirty burners (which you can see) there's not too much else from there.

    Dale

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