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  1. #1
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    Sep 2014
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    Portland, Oregon, United States
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    Carrier heat exchangers

    What's the deal with some of these smaller carrier RTUs and the heat exchangers that crack at the front portion of the tubes, right on top? Just a manufacture thing? If noticed a ton lately.

  2. #2
    Join Date
    Sep 2016
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    I always look forward to the first maintenance of heating season. We find tons of bad carrier heat exchangers every year.

  3. #3
    Join Date
    Nov 2006
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    Southeastern Pa
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    The one good thing about doing a Carrier is that I can do the whole thing in under and hour.


    Try that with a York......
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  5. #4
    Join Date
    Mar 2016
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    NY
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    Quote Originally Posted by heatingelement View Post
    What's the deal with some of these smaller carrier RTUs and the heat exchangers that crack at the front portion of the tubes, right on top? Just a manufacture thing? If noticed a ton lately.

    I have seen the seams crack, right on the bottom of the tube where rust holes are, sometimes found them right off the burner area, and I see them a lot on the crinkled baffles by the inducer. They are easy to rip out though, probably for good reason.

    When you replace them check the inducer wheel for fiber buildup. I always thought, whether it’s correct or not, when there was buildup it would cause flue gas to sit in the heat exchanger and condense causing rust and then obviously failure. Whether or no that theory is true, I’m not sure but what I do know is those fibers will cause rollouts eventually and it eliminates a service call for the future.

  6. #5
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    Mar 2016
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    NY
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    Quote Originally Posted by timebuilder View Post
    The one good thing about doing a Carrier is that I can do the whole thing in under and hour.


    Try that with a York......
    If I were to manufacture a unit it would be a York because I love to over complicate EVERYTHING. I did a heat exchanger with another tech on a York, has to rip half the face off to remove be old one.

  7. #6
    Join Date
    Jan 2010
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    In the summer with cool air on the outside of the heat exchanger and warm air inside the exchanger ( ambient air is inside ) these exchanges will sweat, a lot. I've seen water dripping out of the inshot burner tubes.

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  9. #7
    Join Date
    Jun 2003
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    Texas
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    Quote Originally Posted by heatingelement View Post
    What's the deal with some of these smaller carrier RTUs and the heat exchangers that crack at the front portion of the tubes, right on top? Just a manufacture thing? If noticed a ton lately.
    they are junk from the gitgo

  10. #8
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
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    Quote Originally Posted by VTP99 View Post
    In the summer with cool air on the outside of the heat exchanger and warm air inside the exchanger ( ambient air is inside ) these exchanges will sweat, a lot. I've seen water dripping out of the inshot burner tubes.
    yup
    Col 3:23


    questions asked, answers received, ignorance abated

  11. #9
    Join Date
    Jul 2012
    Location
    WA
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    One of my coworkers who did a lot of PMs was always finding cracks in Carrier heat exchangers. Carrier sent us an email stating that they were only “cosmetic cracks” and wouldn’t be warranty’d unless carbon monoxide was entering the space. Unfortunately he no longer works for us and I don’t have the email any more.

  12. #10
    Join Date
    Dec 2007
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    Quote Originally Posted by Red Man View Post
    One of my coworkers who did a lot of PMs was always finding cracks in Carrier heat exchangers. Carrier sent us an email stating that they were only “cosmetic cracks” and wouldn’t be warranty’d unless carbon monoxide was entering the space. Unfortunately he no longer works for us and I don’t have the email any more.
    These cracks are only the ones at the tube connection to the inlet collection/header manifold.

    We have the same email that I was to give to a specific customwr. Another company shut down their 4 units due to these cracks. No CO issue, other company just looking to make some money.

    Carrier will, IIRC, replace the hx once under this policy/email.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  13. #11
    Join Date
    May 2018
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    MN
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    Besides being shit from day 1... The end burners tend to get misaligned causing the flame to be more towards the outer edges of the HX tubes, or a small part of the flame doesn't go into the HX tube. The flame retainer is a dead giveaway of this happening


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