Well the saga continues.The control board was replaced, seems that the adc on this model is on that board. They also changed the thermister in the fridge section and verified damper operation. Saturday morning, full ice maker 0 degrees in freezer, 37 degrees in fridge all good. Saturday night go to bed at 10, ice maker down about 1/3 of the way. Sunday morning the ice maker is not quite full and the fridge is almost 50 degrees. I can see that the fridge is going through the defrost cycle as the bottom edge of the coil can be seen. This has really got me puzzled.