Ice makers, in general have 1 of 3 problems. Number 1 has already been mentioned.
- The handle switch (bucket full) is active.
- The motor which pushes the ice out is not turning (assuming bucket handle is not up).
- the heater in the ice maker try is not working.
There are a few other possibilities I will explain shortly. When the cycle to dump ice starts, the motor rotates the cube push bar, and turns on a heater underneath new ice cubes. The push bar rotates, pushing the ice out of the tray into the bucket. By the way, as part of the cycle before the rotating push bar stops, the ice tray fills with water and the heater turns off. The water freezes and the dump cycle goes again.
First, has the cube tray filled with water completely? The cycle can't start until the tray is filled with water. If not, find a way to fill it with water. *if the maker dumps ice in a few hours, there is the problem. Water hose may be clogged or not getting water...check the fill solenoid (external part from ice maker).
If still not dumping ice, see if the rotating push bar has rotated trying to push the ice, if yes, the problem is the heater is not coming on.
Going simple the entire ice maker can be easily replaced (ebay, Amazon, etc.) Note, this will not fix it if there is another external problem like the water solenoid, water to fridge not turned on, clogged water filter, etc. Troubleshoot the cycle to find the fix. Good luck.