Our ice maker (Kenmore bottom freezer refrigerator) had stopped producing ice. There were frozen cubes in the trays, but they wouldn't dump. In an attempt to get it working, I made the freezer colder (6 on a 7 scale), and the ice in the try seemed to become less frozen.
I then changed the freezer to a 2 (1 is the warmest freezer setting on this model) and it pumped out ice ever 2 hours or so for a day then it seemed to slow down again. I bumped the temp to 3 and got a few more trays and now it's stopped again. In the 48 hours that I've experimented, I've made about half a bin of ice.

Any thoughts on what might be causing this?
And, would the ice maker be difficult replacement on this model?

Thank you!!

I'll definitely try the thermometer to check the cold control.

When I set it colder (to a 6) I know that it got quite a bit colder as the ice cream sandwiches were very hard relative to how they normally are at a 4 setting. However, the ice in the trays actually went from solid to soft.
At a 2 (nearly the warmest setting), it pumped out ice like crazy for a day.
Would the cold control be an easy DIY repair?