This happened to me too. The water dispenser and ice maker worked perfectly before I replaced the filter. I put the old one back and it still didn’t work. I checked the web and found advice on adjusting the water pressure and filling the new filter with water. (One of them said to do this for 20 minutes!) I knew water pressure wasn’t the issue because the old filter worked fine. I made sure the new filter was filled with water but that didn’t do the trick. The fact that reinserting the old one didn’t work was a clue that I didn’t follow right away.
Finally I remembered that when I removed the old filter by turning it to the left I felt a moderate amount of resistance and then it turned easily enough and came out. I figured that was just adhesion on a part that hadn’t been turned in more than a year.
Nope.
Keeping in mind that resistance that I had noticed when I removed the old filter I inserted the new one (filled with water) and after I felt the resistance I turned a bit more while being careful not to overdo it. It was like going over a small bump. Suddenly the filter turned a bit more and then seated itself. The water flowed!
It would have been nice of GE to mention this in their manual. Idiots.
Hope this helps some people who have this annoying problem.
Bob in Brooklyn