This washer is tripping the rcd in the last few minutes of the programme, I was thinking carbon brushes but I believe the motor on these are the induction type ?
cant think what it will be may just be coincidence its tripping at the end unless its repeatable over and over. try changing sockets, its a long shot as I would expect heater to cause problem if it was bad wiring
have you checked for leaks the only happen on spin ?