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  1. #1
    Join Date
    Sep 2012
    Location
    washington DC
    Posts
    55

    Cracked heat exchangers

    I don't know if this question has been asked.

    Does anybody have any secrets or tricks to finding cracks or go to spots for different brands.
    I know the carrier heat exchangers crack in the secondary or the rivet/ weld Demple

  2. #2
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,128
    There is a long thread in the pro forum with lots of pics, and tips on where to look.

  3. #3
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,123
    Moved to Tech to Tech forum.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  4. #4
    Join Date
    Sep 2012
    Location
    washington DC
    Posts
    55
    Unfortunatly I don't have access to the pro form yet
    Sorry I thought it was in tech to tech

  5. #5
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    Anyone have a link to it, or no which spot it's in?


    Sent from my iPhone using Tapatalk

  6. #6
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,128
    Quote Originally Posted by Joehvac25 View Post
    Anyone have a link to it, or no which spot it's in?


    Sent from my iPhone using Tapatalk
    http://hvac-talk.com/vbb/showthread....nd-info-thread

  7. #7
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    Awesome I knew someone would be better at finding stuff then me. Thanks


    Sent from my iPhone using Tapatalk

  8. #8
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    Last one I found, I had a real lazy burner and dark condensate, older janitrol. Told the homeowner the secondary was bad. When I pulled the the furnace out the damn secondary fell right out lol.


    Sent from my iPhone using Tapatalk

  9. #9
    Join Date
    May 2011
    Location
    Roanoke,Va. USA!!
    Posts
    9
    A digital manometer to the pressure switch on gas furnaces.Turn the fan on on and if you get a reading...you have a cracked exchanger.

  10. #10
    Join Date
    Jul 2010
    Location
    nebraska
    Posts
    1,629
    There are classes/seminars on heat exchanger inspections. IMO they are worth many times the price of admission.

  11. #11
    Join Date
    Sep 2012
    Location
    washington DC
    Posts
    55
    Good to know. Thank you

  12. #12
    Join Date
    Feb 2010
    Location
    Calgary, Alberta
    Posts
    1,112
    A good inspection camera will help as well.
    My first journeyman told me a trick that I still use in tough cases. Pour water over the heat exchanger, if you can see inside the HX, the water will soak through.

  13. #13
    Join Date
    May 2011
    Posts
    54
    I guess it's a great question but I almost feel like you should be charged for the first answer. Lol. Although I will say rollout switches don't lie unless they are defective. Don't just hit the reset and leave as you will be back very soon to disassemble the unit in some cases.

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