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Thread: Welding a Heat Exchanger

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  1. #1
    DIY Senior Member molo's Avatar
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    Default Welding a Heat Exchanger

    Can this be done with a safe result? There is a 4" crack running up from the lower left corner of a heat exchanger on a stand alone Empire furnace. I want to be safe but if it can be done safely I may contact someone to do it.

    Thanks for any replies
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  2. #2
    Plumber jimbo's Avatar
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    Welding cast iron is possible, but requires certain skill and the right equipment. Unless you are a skilled welder, I suspect it would cost you almost as much to have it repaired, as to just get a new furnace.

  3. #3
    In the Trades Gary Swart's Avatar
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    Molo, here is a link to an article on welding cast iron. After reading it, I think you may agree that it may not be a worthwhile venture for your problem.
    http://www.lincolnelectric.com/knowl...ronpreheat.asp

  4. #4
    DIY Senior Member molo's Avatar
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    OK, Thanks for the responses. It doesn't sound like a good idea. Why do they make them so thin? This is an Empire that isn't that old and it's cracked!
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  5. #5
    Homeowner Thatguy's Avatar
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    Quote Originally Posted by molo View Post
    This is an Empire that isn't that old and it's cracked!
    How old?
    How did you discover the crack?
    Does your furnace have a flame rollout switch?

  6. #6
    DIY Senior Member molo's Avatar
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    It might be 10 years old. It is a vented stand-alone furnace about 3' high and 4' wide. We noticed the crack during a cleaning and inspection. I do not know if it has a flame rollout and I know this heater has been used with this crack.
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

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