remove the plinth from your kitchen units then the lower front panel beneath the door.  you will need a torx bit.  There are 2 tubes that allow stray drips of water to collect on the bottom tray of the dishwasher.  If water collects here, and does not evaporate, it triggers a float switch to shut off the dishwasher.  Sponge out any collected water, put it back together, and it should hopefully be back to normal.
                 rossi
                
 March 2009