Refrigerator section drain ices up

My experience on the french door dual evaporator units have been to treat the problem from the back having to avoid the labor intensive task of removing ALL of customers food and shelving.

The past month or two I have been installing the WP drain rework kit, 3 out of 4 have worked with just installing the kit and defrosting the frozen drain from the back using a steamer and fishing a 5/16″ plastic line slowly with steam to remove ice build up. After confirming the drain is clear, force a defrost cycle from front controls, and visually inspect water coming from drain kit, you are good to go. The FF drain is the farthest to the right between the water valve and condenser coil.

That 4th unit, my problem child over the past 6 months, which I will be going back for the last time next week and will be installing some copper solid wire from heater and inches & inches down that hole. Unit has had the following replaced – fresh food cover, a new Samsung drain tube kit, Samsung’s evaporator heater probe, and a WP drain kit (which has been over a month) but now acting up again. If the copper wire does not fix it, there has got to be some missing insulation where the drain runs behind the freezer, the freezing appears to be starting halfway between the back drain tube and the drain below the evaporator coils.

So, other than the problem child above, the WP kit seems to be working. I will update if anything changes.
Samsung training videos link

https://www.appliancevideo.com/advanced-search/#sf-{“2″:”210″,”4″:”45″,”search-id”:”vidsearch”}