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    npb575s's Avatar
    npb575s Posts: 19, Reputation: 1
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    #1

    Dec 21, 2008, 09:34 PM
    Burners are burning yellow/orange
    I have a Goodman GMP100-4 I had some problems with the upper limit switch, replaced that, but now it keeps getting thrown, When I set down and watched the furnace go through its steps I first noticed that the form of the burn was a little off, I did see a little dust and stuff in and around the burners so I broke out the vac and cleaned it up, but I'm having the yellow/orange flames, any ideas on what to do?
    MarkwithaK's Avatar
    MarkwithaK Posts: 955, Reputation: 107
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    #2

    Dec 21, 2008, 09:38 PM

    If I were called out to this job the first thing I would check is the inlet and out let gas pressures, then go from there.
    npb575s's Avatar
    npb575s Posts: 19, Reputation: 1
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    #3

    Dec 21, 2008, 09:47 PM
    Quote Originally Posted by MarkwithaK View Post
    If I were called out to this job the first thing I would check is the inlet and out let gas pressures, then go from there.
    Is this something that I would be able to do as a consumer or would it be best to call in a pro? What does this consist of? Thanks for the Reply
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #4

    Dec 21, 2008, 10:56 PM

    Hmm... upper limit keeps tripping? Are you referring to one of the limits that surround the burners? Try this: observe operating sequence from start-up. If the flames start straying away from the cell holes when the blower starts, you probably have a leaky heat exchanger. If so, get a pro to evaluate unit ASAP.
    npb575s's Avatar
    npb575s Posts: 19, Reputation: 1
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    #5

    Dec 22, 2008, 04:52 PM
    Quote Originally Posted by KC13 View Post
    Hmm...upper limit keeps tripping? Are you referring to one of the limits that surround the burners? Try this: observe operating sequence from start-up. If the flames start straying away from the cell holes when the blower starts, you probably have a leaky heat exchanger. If so, get a pro to evaluate unit ASAP.
    That is exactly when it starts. Is the exchanger a fixable part or does it have to be replaced? Thanks for the Info.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #6

    Dec 22, 2008, 05:10 PM

    It can't be repaired, and replacement may be economically impractical if the unit is out-of-warranty. Most have at least ten years, some twenty, and a few have limited lifetime. Even in-warranty, you may still be liable for labor expenses.
    npb575s's Avatar
    npb575s Posts: 19, Reputation: 1
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    #7

    Jul 2, 2010, 01:21 PM
    After swapping the heat exchanger the unit is back up and running. THANKS ALL!!
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