The machine starts filling with water and after a short time (seems as though this is when enough water has gone in) the output pump starts and empties some water out. This then stops and the input of water resumes only for the process to be repeated endlessly. I have removed the top/left hand side of the machine and can watch this process taking place. I have cleaned all output pipes, checked that the water input is OK by removing the solenoid input valve and making sure it is not blocked/sticking. Any ideas? Could it be the impeller jug?