DH just replaced the water regulator on ours. It would overfill the ice cube tray and we would get a solid block of ice in the basin. He tried everything he could think of. . . making the cubes smaller, etc. Finally he researched and found the water regulator could be the problem. Ordered one on line and put it in. It has worked ever since. This is the second ice maker in our fridge. The first quit working and he ordered another on line and installed it.
I'm glad he's so handy.
Dale