Thanks iadom for your quick response and pointing me in the right direction. Checked dishwasher today and found the pressure switch pipe blocked, used a bicycle pump to unblock. Run machine and it ran for a longer time before the two light flashed, cleared the pipe again and the machine carried out a complete rinse cycle. Obviously there is stil debris in the bottom 0f the dishwasher filter area, once the machine has completed a complete wash sequence i will add a cleaning agent. Once again thank you and have a good Christmas.