The story starts with a frost free fridge that was only 2 months old & was dumped in the scrap yard. It was deemed not worth reparing & a new one was supplied to the customer (it still had the sales docket in it). I brought it home & checked it out, found it was almost out of gas. Put some gas in & went looking for a leak using dish washing liquid. Found the leak in the Evaporator pipe where it was poorly silver soldered. It was not in an ideal position to use the oxy to re solder. So I used an Epoxy glue used in refrigeration for repairing holes in aluminium plate evaporators, as used in portable compressor fridges (people some times poke holes in them using knives to defrost). So I cleaned up the joint & covered the leak with the epoxy. Now have a good free fridge. The purpose of this post is be aware an accidental hole in an evaporator is not the end of your fridge. Ive been doing these type of repairs for years now & are effective.
In my years of experience with soldering I can see the joint was too hot when soldered... see the belly of solder under the joint.. that's excess run and the actual joint is starved of solder.