Hi.
I had exactly the same issue.
After reading the comments here and looking at the write up in the package, I figured it was probably the water pressure going.
1. I located the water valve controlling the water going to the fridge.
2. I increased the water flow to maximum.
3. I told my son to try to get water from the fridge while I was decreasing the water flow.
4. Then at one point he said the water is now flowing.
What a relief!!!!!!!!