Chuck T Albuquerque , NM October 26, 2015 Sud changing to f35 Looked on line for possible cause. Cleaned all hoses and parts then tested. Still have sane code so determined it was the drum pressure switch. Ordered part and overnight shipping (took 3 day's). Installed new pressure switch and tested machine. Works like new now. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours