Product review (5 stars): Easy to install
There are some very clear youtube videos that walk you through every step of replacing this, search for the part number "6501KW2002A".  The hardest steps were getting my washer away from the wall to get to the back, and I nearly stripped the retaining screw that holds a wire down.

If you google for your washer model you'll also find the service/repair manual, which will explain how to activate a debug mode on the washer control panel.  Then you can single step through functions, like spin left, spin right, turn on/off hot or cold water, and empty the drum.