I don't know when, why, where, what...but one morning, it just stopped making ice.
The fridge is only about 5 years old, never had any problems.
Does anyone have any clue as to why it would just stop working?
My icemaker has a little arm thing that gets pushed up as the bin fills with ice, when the arm gets to the top of the bin then it stops making ice so the bin doesn't overflow. If your icemaker works similar to that, you might check and make sure that the arm hasn't got stuck in the up position, that might be making the icemaker think the bin is already full of ice. The other thing I would check is that the water supply to the icemaker is turned on. Those are the two obvious things that you can fix yourself, but if it's something else then you may need a professional.
The other thing you might try is unplugging the fridge, then plug it back in again--if there's something funny with the electronics that might reset things? This is just a crazy idea, sort of like how rebooting a computer fixes half the problems you have, maybe this would work the same way. I honestly have no idea if this would do anything or not, but it only takes a few seconds to try it and it won't hurt anything!