If you can hear the ice maker grinding, it will indicate the motor or gear has failed and the complete ice maker will need to be replaced. If there is no sound, try to manually place this ice maker into a cycle. If it won't start, it will indicate the ice maker or the main board has failed. Since you said it does cycle and refills, it will again lead to the ice maker being the issue or the temperature in the ice maker compartment is not cold enough.
Also, check to see if the sensor may have come loose under the tray. The sensor should be mounted directly under the tray and if it has come loose, it will cause this problem. If the sensor is still in place, the ice maker # AEQ72909602 would then need to be replaced.
How to replace an in-door ice maker on a French door refrigerator DIY repair guide: searspartsdirect.com/diy/repair-guide/how-to-replace-an-in-door-ice-maker-on-a-french-door-refrigerator
You can find all parts and diagrams on Sears PartsDirect: searspartsdirect.com/model/4oi2wd5me6-000582/kenmore-79571609014-bottom-mount-refrigerator-parts
This is the ice maker assembly: searspartsdirect.com/product/10c7spc3wf-0046-795/id-aeq72909602
If instead you'd like a professional repair, call Sears Home Services at 1-800-4-MY-HOME.