At my wits end.
The problem started with freezer working/refrigerator warm. Defrost issue, right? But the heater works. I can see it come on and off. And tested the continuity for the thermostat and heater and it was good. I have replaced all three thermistors and the mother board. And still the freezer works great but the refrigerator side wont get properly cold.
A couple of anecdotal observations: I don't see the damper door opening. When I first turned the unit on after it being off for a while, it opened but only for about an hour as far as I can tell. And doesn't seem to be opening at all now. (But I'm not looking in all the time.) And if I manually open it, I can't feel any cool air coming through - and, yes, the evaportor fan is running. In fact, it seems like the evaporator fan is running all the time.
Also, this unit has a readout on the front of the top of the door frame with just colder/warmer settings from 0-9. Whenever I open the door, there are no numbers there. But just touch any of the colder/warmer "buttons" and it comes on - at 5. Does that tell me anything?