Product review (5 stars): Simple Fix
This is a no brainer.  If your ice maker quits making ice, this is a simple diagnosis.  Manually pour water into the ice maker.  If it makes ice when you pour the water in, but does not make ice when you don't, this is most likely your problem.  It is a simple procedure to change it out.  If you want instruction, just look on youtube.  So if you are a do-it-yourselfer, this is a easy way to save a one to two hundred dollar service call.  You can also save about $30. by buying it on Amazon.
Highly recommend to anyone who likes to save $$$ and do things yourself.