Lois H Ottumwa , IA October 24, 2016 F20 error code Orderd wate inlet valve and water level pressure switch on Thursday,standard ship, arrived Friday, the next day. Followed the on line video. Had it up and running in an hour. F20 gone and wash time cut in half. Thanks 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes