I moved into a new house about a year ago and didn't realize the water had very high iron content. It wasn't until the aerators in the sinks started getting blocked up that I realized I had an issue. Turns out I had a filter on the water line for the house that we were never told about and it was BAD. I replaced that and everything was good again.
About 2 weeks after replacing it, the dispenser started to slow down, until it became just a trickle. My thought was the fridge filter so I replaced it, but no change. Checked the incoming water pressure and it was good. Unhooked the line at the first solenoid valve and water just trickled out.
I bought a new solenoid valve and replaced it. I ran some water out of the incoming line before hooking it back up incase there was anything in the line, but I guess that wasn't enough. I tested it the same way with the new solenoid valve and had great flow after the valve, hooked it all back up and had great flow at the dispenser.
After a couple cup fulls, it slowed down again, not quite to as bad as before, but way slower than it was. Tested the flow after the solenoid valve and it was again really slow. I am guessing there was still stuff in the line and is now jammed up inside the valve again. As far as I know, there isn't any type of screen on the valve. At this point I don't know what to do, other than replace the valve again. #diy source