The ice level arm got pushed up into the vacation position. (For that matter, if the ice bucket has a limiter switch on the back, (like the icemaker won't work if the bucket's not in the freezer so it doesn't dump ice all over the place) you may not have the bucket pushed in far enough or the switch got whacked out of alignment)
You have an ice blockage somewhere in the unit (try using a hair dryer on it for 15 minutes...)
It be broke.
After 2 years, it shouldn't be, but it could be broken. Ice makers don't cost a fortune, if the top two suggestions don't produce results, call the service guys and have them take a look, or just buy a replacement icemaker and install it yourself. They aren't hard, as long as you can read and follow directions. You even have the advantage of being able to see what it's supposed to look like when you're done.