Product review (5 stars): THE MOST LIKELY CAUSE OF ICEMAKER FAILURE ...
Replacing these electronic modules (there are 2 of them in this kit ... one on each side of the freezer door) fixed my icemaker problem.  It was not the icemaker itself, and it was not the water solenoids. That being said, I do recommend replacing the icemaker if your refrigerator is at least 5 years old.  See my review on this.

Replacing these modules is a very easy to do fix ... but take your time ... the wire harnesses are short ... don't try to yank them out of the door or you'll have a bigger problem on your hands.  Be sure to unplug the refrigerator before working on any electronic components.  After everything in newly installed and re-secured, make sure the icemaker switch is flipped to the OFF position, then plug the refrigerator back in. THEN turn the icemaker switch ON.  You should start getting ice in an hour.