When commencing a wash cycle the dishwasher takes in water but then rapidly alternates between fill and empty pump mode.At no point does the main wash arm pump operate It continues to do this until the machine is switched off.
I have removed the side panel but can see no obvious problem.

Fedup, April 2009

Panic over I discovered a poor connection in the level sensing pressure switch.(to the left of the float switch)
All now working correctly

Fedup, April 2009