Start by checking the temperature at the ice maker to ensure it is cold enough to cycle and drop ice, temperature should be below 10°f. If it is cold enough check that water is getting to the ice maker. If the temperature is good and the water is getting to the ice maker then it would need to be replaced. https://www.appliancepartspros.com/whirlpool-icemaker-w10873791-ap6026347.html