Could be a number of different things. Possibly the fill line where the water enters the back of the freezer is frozen over and not allowing water to enter the IM. Might be the water valve which sends water up to the IM. Some of these models have more then one valve involved. Do you possibly have the "P" number that is on the ID plate? That differentiates the different revisions on this model.

The water valve is located in the back of the refrig. It's what your house water line connects to on the rear of the refrig. Below is a picture with the part #. The spot where I mentioned it might be froze is in the freezer section where that tube goes into the fill cup of the IM. Although when your behind the unit you could disconnect the plastic line that goes up the back wall feeding your IM, and blow through it to see if its clear.


Part number: AP4134853

I don't like guessing, but there's a good chance it may be the valve. The only real way to prove it is to have a volt meter handy and check to see if it's getting power when the IM goes through a harvest mode.

You can try that. You'll have to push the water dispenser button to send power to the valve. If water shoots into the IM then you know the valve is ok. Don't hold down on the dispenser too long or you'll have water all over your freezer.