Hello, and thank you for using this service. I'll be helping you with your problem today.
So both F35 and SUD means that the unit thinks the tub is flooding. So unless the water level inside the washer is actually over half way up the door, your pressure switch has failed and isn't sensing properly. You'll need to manually open the door first, then replace the pressure switch under the top panel mounted to the right side wall to get rid of the error. If your door happens to be locked (this happens sometimes with this error), remove the 3 screws along the bottom of the lower front panel. The panel will then pull straight down and off. Once you remove this panel you can reach up behind the upper front panel and pull down on the small plastic pull tab attached to the bottom of the door lock assembly. This will manually unlock the door so you can open the door.
To access the pressure switch, pull the washer forward and remove the 2 or 3 screws coming in from the back of the top panel. The top panel will then pull straight back, up, and off. The pressure switch is mounted to the right side wall above the tub and is the only part with several wires going to it as well as a small rubber hose. Disconnect the rubber hose and blow through it to make sure it's clear. If you still have an issue, replace the pressure switch itself.
Now as a last note I also want to mention that sometimes the control board will cause this issue, but there is no way to check. So if you replace the pressure switch and still have this error, the main control board (CCU) would need to be ordered and replaced.
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