hotpoint dishwasher bf167 pump timed out any solutions?

up until last week my machine was working fine,now when selecting any programe the pump runs after 10sec you hear a bleep and the LED moves back to heavy wash the first LED on the left hand side the pump continues to run for another 30 sec .I have renewed the solonid water inlet valve ,checked the level switch with a multi meter and cleaned the drain outlet and pump,any ideas on how to reset this problem