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  1. #1
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,617

    DOA microchannel evap

    Puncture! Hisssssssssssssssss. Installers say they didn't do it, must have been factory damage. It was a cased coil.
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  2. #2
    Join Date
    Apr 2001
    Location
    Over Here
    Posts
    1,105
    Here we go again!

  3. #3
    Join Date
    Feb 2012
    Location
    Opelousas La.
    Posts
    90
    Going to have to be careful not to drop a screwdriver on those coils when working on the blower.

  4. #4
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    www.durafix.com

    Learn it, use it, love it.

    Your welcome.
    If more government is the answer, then it's a really stupid question.

  5. #5
    Join Date
    Feb 2006
    Location
    FL
    Posts
    566
    Thank you Mark.

    I have been wondering what to use on these new aluminum coils.
    I assume you have personally used dura fix? Is this the best way?

  6. #6
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Quote Originally Posted by BaldLoonie View Post
    Puncture! Hisssssssssssssssss. Installers say they didn't do it, must have been factory damage. It was a cased coil.

    mark beiser mark beiser is online now
    Professional Member*

    Join Date: Aug 2004
    Location: North Richland Hills, Texas
    Posts: 11,114



    www.durafix.com

    Learn it, use it, love it.

    Your welcome.



    ------------------------------------------------------------------------------------------










    -
    Good thing I got a lot of practice with a similar product from my domestic frig days.

    Manual defrost friges had exposed evap surfaces in freezer and they got punctured pretty regularly. So I used a lot of Aluma-Weld to patch 'em.

    You just hopped you got to em before they sucked in water....me and other guys were changing up to four FDs filled with water before we'd condemn the box.
    Last edited by hvaclover; 03-25-2012 at 08:02 PM.

  7. #7
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by jvillehvac View Post
    Thank you Mark.

    I have been wondering what to use on these new aluminum coils.
    I assume you have personally used dura fix? Is this the best way?
    I haven't used it to repair a leaking system yet, I just wanted to have something available for the inevitable.
    I first found out about it a couple of years ago while surfing YouTube videos on aluminum soldering, and was intrigued by a demo of it where a guy was able to solder 2 aluminum cans together with it, and patch some quite large holes in a regular coke can.

    I've tried it out on some pieces of aluminum tubing I cut off a scrap Trane condenser, as well as some small aluminum parts to test it out.
    The material, and its bond to the aluminum, are both stronger than the aluminum itself.

    The key, like with any aluminum soldering, is to get the surface as clean as possible, make a little puddle of the solder material, then scrub through the puddle with the SS brush to break up the oxidation layer to tin the raw aluminum surface with solder, otherwise you are just sticking it to the oxidation layer.

    The surface of raw aluminum oxidizes almost as fast as you can scrub the oxidation layer off of it, which is why soldering aluminum is "hard" to do.

    If you scrub make a small puddle of the solder, then scrub the aluminum through the puddle, the solder sticks to the raw aluminum before it can oxidize.

    with regular aluminum soldering, to cover anything larger than a tiny pinhole, you would have to tin the area being repaired with solder, and tin some solder onto a patch, then solder the patch over the area being repaired.

    With Durafix, you can bridge some fairly large holes with it, and once you get it to stick to the raw aluminum, you can build up the thickness as much as you want, and it is stronger than the base metal, so no need for the added patch.

    There are a ton of demonstration videos of it on YouTube.
    If more government is the answer, then it's a really stupid question.

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