Tub was mysteriously slowly filling with water.

Figured out that the only thing that could be causing this was a bad inlet valve. Repair was really easy. Didn't even have to pull machine out from under cabinet. First removed kick plate. Then placed towel under the old valve. Undid the power connections and water lines (in and out). removed the to screws holding the valve to the body of the washer. With the valve free, removed the brass elbow and installed it on the new valve. Reinstalled the valve and all connections. Works like a charm.