Ice Maker Won't Stop Making Ice

Try resetting: lift arm all the way up wait a few seconds then put it back down. This trick has worked for me and family. It cost nothing to do, try it. Good luck.

It sounds like you will need a repairman. There is probably a part in the arm that is broken like a small spring or piece of metal. If you don't want it to make any more ice you can shut off the water. The thin copper pipe that supplies water to the fridge has a cut-off switch, usually near where it starts, mine is under the kitchen sink.