Ok, so this is weird.
I've rebooted that fridge dozens of times. And it doesn't change and the top shelf is 50deg.
So, I pulled the fan assembly panel out of the freezer. This has 3 wires. Ice fan, condenser fan, and a thermister.
I tested the fan, got I think 36kohms Couldn't reach in to put the tester to see if 12v was at the plug.
I put it all back together, pushed the "test" button on the PCB and all the fans came on, the compressor, all lights on the door. So the fan works.
Went searching for a PCB for this model. Nobody has it in stock.
Got frustrated. Started thinking, I need to buy a new fridge to hold me over until I can get a PCB. Started pricing new refrigerators and felt a pain in my wallet butt cheek.
Went back and tested temp on top shelf wall. 32deg !!!!!!! Wait, WHAT?
Were the refrigerator gods smiling or laughing at me. I don't know.
This morning.....entire fridge is 34degrees. Everything very cold. Seems to be happy again.
Got me thinking. Pulling the panel and reconnecting the wires could have solved a loose connection on one of them. Could this have been my problem all along? Surely it would have thrown an error if the case.
Please, refrigerator gods, smile on me. Keep this thing running.