RESULT,REMOVED AND CLEANED BOTH PUMPS AND THE DISTRIBUTION VALVE (FOUND A LARGE PIP STUCK IN IT!)THE E8 FAULT CODE HAS GONE AND IT'S AS GOOD AS NEW.SO MY OWN ADVICE IS TO GIVE IT A GOOD SERVICE,IT ONLY TOOK ABOUT AN HOUR AND YOU DONT NEED ANY SPECIAL TOOLS,NEARLY GAVE UP ON THIS,BUT DIDN'T COST...