Check the lever arm to ensure it is not frozen to the side of the ice maker. It is on the left side of the ice maker and is a white arm. During filling, if the refill tube is not perfectly straight, some water may splash on the arm and it will freeze to the side of the maker. If this happens, it thinks the tray is full of ice and will not cycle wither because it is stuck and/or senses the tray is full. Be careful and check to ensure you do not break the arm.