Door Gasket - Gray

We were misled into believing we needed to replace the door seal, and after this replacement was completed we found out it was not the case.

Instead we needed to clean out the EXTENSION-DRAIN,DUAL EVAP W11661573, part #5 on the unit diagram, which is found on the back of the unit.

Back to the seal instructions:
Once you remove the original seal you cannot reuse it, so if you replace it and it is not what you needed, you can't return the not-needed part. There goes about $190.

Also, the seal comes with no instructions (at the time there was no instruction video here either and we had to search other sites). It turns out it takes at least 24 hrs for the rubber seal to regain its shape. You also may have to use a hair dryer for this pre-installation process. Because of this, I marked the time of repair as more than 2 hours.
The end of the instruction video we followed called for testing the new seal installation with a bill ($), if you can pull it out easily from the closed door, you need to continue heating the seal with the hair dryer to improve sealing.

So do yourself a favor and test you fridge seal first, to see if you really need to replace it. Close the door with a bill or paper trapped. If it is loose or falls out, seal needs to be replaced, if the bill/paper stays firm enough, the seal is fine.

It took a lot of research through other resources, not Partselect, to eventually fix the ice formation issue. From all the appliance repairs I have done, this was the most frustrating, although not the most complicated. Since no part needs to be purchased (though you could replace the drain tube for just $24 instead of hassle to clean it), no real help from parts stores is available, and you have to rely on random people with their home videos, some are reliable some are not. We could not find one with our model (596.72383411) and had to figure it out based on similar models. Our drain tube has a siphon, so it is a little harder to clean than other models with s straight tube.

Good luck!