Hi
It sounds like the pump is jammed. To unjam the pump looks hard but is easy when you know how. Just remove the 4 torque screws on the front bottom of the dishwasher, you will need to remove the kitchen plinth to access this, the dishwasher does not need to be removered for this. Inside at the front you will see a pink and white plastic pump. The pump front unscrews anticlockwise. A small plastic tongue has to be bent slightly to unscrew. remove the obstruction and all should be ok.
Cheers
Jocky
Jocky, February 2008