Repairing an aluminum coil

We have a trane four ton condenser coil that has a leak in the coil. the leak is in the discharge header on one of the tubes where it transitions from aluminum to copper. I know at one time Trane made a kit to couple these tubes back together, but I never had to use it and am wondering if anyone had used it with success, or brazed it closed? The coil is 4 ton, 410 a
thanks to all
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I purchased some "Aluminum Braising sticks" once and had minor success sealing up a hole in a coil one time. I melted the channel closed and stopped the leak that way. not really a success in my mind but the leak was gone. As far as Aluminum to Copper… I remember that repair kit but never used one. Can't help you on that one except to show you this Trane repair kit on amazon.com
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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