The Water Inlet Valve:There are many different designs

Example: Is your ice dispenser tray in your side by side door? If it is, you might have a emitter board that detects the level of your ice bucket. This emitter board commonly fails and needs replaced to restore function to your ice maker. If you have this design check the kick plate of the machine for the Tech sheet, This sheet will help you determine your problem.

A common problem with most ice maker systems is the water valve has a slow leak and freezes the water inlet tube to the ice maker, causing the ice maker not to receive water. In this case you need to replace the water valve or the water valve simply is bad. you will half to defrost the tube if it was frozen and make sure you replace the valve.