GE Monogram 36" bottom freezer refrigerator - Freezer too cold @ -9 / Fridge at 44*F

I have a GE Monogram 36" bottom freezer refrigerator with the following results Freezer too cold @ -10 / Fridge at 44*F.

I replaced the 2 temperature sensors (thermistor) - WR55X10025 in the freezer compartment. After installing these parts, fridge seems to be back to normal for 2 days before it went crazy again. Any suggestion on what to look for?

I have had same problem with my 42" GE Monogram Fridge. Repair people have replaced and cleaned just about everything. Still same problem.Any suggestions or help?