Last fall we replaced the main board due to erratic evaporator fan operation and thisfixed the problem.

Now we have an excessive temperature gradient in the fresh food side. Bottom shelf about 20 degrees. Top shelf about 45.

Freezer temp is about -10 and the evaporator fan bliws a strong stream of cold air but it seems to run to long, almost all the time.

The small damper control door between the fresh and freezer sides does open if manually pushed closed.

Thermostat settings seem to have no effect.