On saterday our dishwasher died so dad rang up the inshurance company on monday and the sceduled a repair for Tuesday between 11am and 3pm. The engineer turned up around 12:30 and found a bit of glass wedged in the moters impeller. £99 later and we have a working dishwasher. I also know how to get to the bottem of the sump to clean out the impeller.