I am having a problem with my integrated Firenzi DW930/1 dishwasher. It will start as normal and then begin beeping continuously. When i open the door the right hand light flashes and the onyl way to start it is to hold it down for 5 secs and then again to turn in back on. It then conitunes for a short while and beeps repeatedly again. Am I doing anythig wrong and do you think it is worht getitng an engineer out or just getting a new dishwasher?