how can i fix my hotpoint wmd960 r?

Hi i have a hotpoint wmd960 (uk) r and recently has been putting fault code f:06 i have changed the interlock switch and new handle thinking it might be that and it is still doing the same clicking noise like it is trying to unlock or lock the door but on trying the door it is still locked any time after starting any cycle and then it puts up the f:06 code and i have run out of ideas thanks in advance