re: Upper ice maker stopped - Solved.

Change the thermistor in the freezer or the control board. The control is easier for the diyer to change but is more $$. But in my experience it's 50-50 control or thermal.

I use a chart. Every brand has a specific ohms the thermistor should read at a set temp. If I find a thermistor reading 50-70° yet is covered in ice I know that's the problem.

Though if it's only the icemaker freezing up. And the heater works. Many times it's the logic on the board that is bad. It can't be reflashed easily so best to change the control.