Product review (5 stars): Whirlpool F35 & Sud error
Fixed the dreaded F35 & Sud error on my Whirlpool Front Loading Steam Washer model WFW9700VW01.  A dozen loads after changing the part,all is well.  Called Whirlpool customer service and they were less than helpful with identifying the part number or explaining the error code. Be careful here, I almost ordered the wrong part.  A part list is available from the Whirlpool website.  The best whirlpool customer service could offer was to send a repair man out for a base $105, plus parts and labor.  Found some great how-to videos on Youtube.  A few tips: To disconnect part from frame, it's a half-turn clockwise.  Part was a bit delicate, so be careful when removing and reconnecting clip/cable.  3 screws on top back to remove washer top.  Found the hidden repair manual after removing the front panel below the washer door (another 3 screws).  The repair manual, which was taped to the inside of the lower panel, provides details on the error codes and explains how to run the diagnostic tests.  Good luck!