I have a client with the local schools who has a Kenmore 400 Clothes washer that is not filling with water. Initially, the timer didn't advance, so he replaced the Timer (Pt# W10199989). Still no water filling. Then he checked the in-line screen filters, and they were ok. So he replaced the fill valve assembly (Part# W10144820) and still no water filling. The valve only sounds like it wants to open for the first second, and then shuts-off completely. No water entering through the new valve assembly. What more is he missing?