I have a ge monogram. I have a ge monogram aka whirlpool ice maker that makes very little ice.

Question

I have a ge monogram aka whirlpool ice maker that makes very little ice. Instead it chuggs after a few minutes of running and continues to do so indefinitely. I have replaced the bin themister and the control board. There is ample water pressure to the unit. the diagnostic tests are ok when you run it in clean mode. any suggestions?