The machine fills up with water but does not shutoff.

The water level is controlled by a pressure switch that is located behind the load level selector knob in the operator console. The pressure switch has electrical connections and an air hose that runs to the bottom of the wash tub. In many cases the air hose comes loose from the pressure switch. The following link explains:

http://www.fixya.com/support/r762094-washer_overflows

Read through the link and let me know if you have any questions. If this isn't a simple matter of a loose air hose, verify your electrical contacts are clean. If all these preliminary checks fail, replace your pressure switch. I hope this helps you.