Water on door quit working

After changing the water filter to eliminate that, I did some research and determined it was probably a water valve. As this unit has a primary and secondary, and the secondary feeds the door (after receiving water from the primary) I mistakenly replaced the secondary. It was the primary water valve which was trickling enough water to keep the icemaker happy but not enough to drive the water on the door. In the future, I will do a test with a spare piece of water line which I ultimately did to figure this one out.