Started with everything frosting up. I checked the thermostat in a cup of ice water...no good. replaced that. The frost seems to have bound up the baffle so badly that the open/close mechanism is damaged...replaced the baffle and the thermistor. The diagnostic lights sequence says everything is OK. I still have food freezing on the refrigerator side. There is a frost build up on the small vent that opens into the bottom drawer. What next?

Thanks for the reply!
Vent 2 has the frost build up. Vegetables in the drawer freeze. A thermometer on the top shelf is at 30 f in the morning. It climbs some during the day but I think that is from openning and closing the door.

I can't hear a difference in the evaporator fan. Could it be that it is always running? About the smaller vent frosting up, I can say that it frosts up for sure at 3/4 closed. I cleared out the ice and closed it completely. I will see what happens over the next couple days. Thanks for your insight!

Both controls have been at the lowest setting for a week. This morning the thermometer we put on the top shelf is at 30 degrees.

Yes. Checked a few times at random intervals. Always a slight air flow.