Empty the dishwasher, and get it into a position where it can be rocked from side to side. Then carefully push the dishwasher over sideways to about 45 degrees; if one way doesn't work, try pushing it to 45 degrees in the other directionThis should empty the vessel containing the float switch, which will re-set.
It worked on ours. After that we opened the door with the pump running and poured any water we wanted to dispose of straight into the pump. This wachine would be 11-12years old by now -I'm sure you can't do that with a processor contolled washer
Richard, November 2008