This topic has been started before, but never answered properly. At least not that I could find.
I went out on a Kenmore SxS M# 10656544400. The freezer is cooling properly. The Ref side was not. The evap fan is blowing properly, the defrost system is working properly, the frost line on the evaporator is great. As in the other threads, the problem is when the freezer door is open, the air from freezer to refrigerator side is blowing cold and strong. When the freezer door is closed, it is very minimal to none. There was a bit of ice in the return line from refrigerator (the hole down by the crisper) to the freezer side. I removed all ice and ran a plastic hose up through there to see if if was all clear and it was.
Right now I have the damper out and laying on the top shelf. It was in the open position, but I left it out to see if that would help. The diagnostics says everything is fine.
With the damper out, there is a bit more air flow, but not near what it is when the freezer door is open.
Does anyone have a good answer to this problem that seems to have happened before?