90% Carrier has rich gas exhaust? - Page 2
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  1. #14
    Join Date
    Dec 2012
    Posts
    9
    That's what I kinda plan on doing, thanks for the help!!!!!!!!!!!

  2. #15
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,032
    Quote Originally Posted by gmoliver View Post
    Just took CO readings and it was off the scale, so i am a commercial HVAC guy, can you give me an idea how hard it is to change out a secondary heat exchanger and time involved?? (Still waiting to hear back from Carrier about warranty details)

    Thanks
    Good find! Last one I had went over 9,000 ppm in seconds.

  3. #16
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    1,658
    I just changed primary and secondary HX on a 90% Carrier today. It took about 6 hours. The secondary was plugged. CO before the repairs exceeded 2k ppm. After the repairs it was 21 ppm. And the exhaust didn't stink afterwards.

  4. #17
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,309
    With the help of my cordless screwgun, I can do a secondary in 45 minutes and secondary and primary in an hour and a half.

    After you do a few, you figure out all the tricks, such as what parts come out as entire assemblies.

  5. #18
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,309
    Obviously those times in my previous post don't include obtaining the parts and filing the paperwork, which takes more time than the actual repair.

  6. #19
    Join Date
    May 2011
    Posts
    79
    Quote Originally Posted by chuckcrj View Post
    over 9,000 ppm in seconds.


    Yeah, get used to 58-series Carriers with bad secondaries if you do any kind of resi work ever, gmoliver. You'll get a lot of them. I work at a Carrier FA dealer so I get that joy pretty much every other day.

    It really is best to try to steer the customer towards a new one. The 59's have stainless construction.

    Either way, Carrier pays for 4 hours of labor to install a secondary. It takes me about half of that while going at an 'unhurried' pace.

  7. #20
    Join Date
    Dec 2012
    Posts
    9
    Thanks for the info. Much appreciated!!!!!

  8. #21
    Join Date
    Jul 2010
    Location
    wisconsin
    Posts
    270
    We diagnose about a hundred or more " sooted " carrier 58 series furnaces every season. We order the primary's and the secondarys, as well as the coupling box. 90 percent of these furnaces were on lp gas. Some were serviced yearly and others were neglected, some were over vented, and excess air readings were too high, or too low. The smell is one you will never forget, which are aldehydes produced from incomplete combustion. I am happy that carrier has redesigned their heat exchanger recently.

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