Product review (5 stars): It works
This was a $350 service call for my folks. When it came the turn of my fridge, it became a simple $15 part. There are a few youtube videos that show you how to install this part as a replacement for the plug that comes with the fridge. Instead of the plug, this part uses the trap to use water as the blocking mechanism so that heat does not filter up to the freezer. As ingenious as old of a trick. The installation was simple (belly flat on the ground).
What I would do differently:
With the fridge unplugged
1) take the old part out.
2) Remove everything from the freezer
3) Remove door and bottom shelve
4) Pour hot water in the back section middle of the freezer where you see the indentation of the draining area
5) check the back of the fridge and see if the water is coming from the drain; if it is, you have unplugged the drain of all the ice.
6) install the new part
7) put the freezer back together and plug fridge