Whirlpool Ice Maker

The icemaker is not making ice. The pan that holds the water is not filling up completely. It only is getting about 1/2 inch of water in the pan. We are wondering if it might be the Sensor (part #2313643) that is bad or maybe the recirculating drain pump? When it does finally make the ice it is real thin and not a full sheet. Model #GI15NFLTB0

The icemaker is not making ice. The pan that holds the water is not filling up completely. It only is getting about 1/2 inch of water in the pan. We are wondering if it might be the Sensor (part #2313643) that is bad or maybe the recirculating drain pump? When it does finally make the ice it is real thin and not a full sheet