My Bosch WFT2800 washing machine starts the cycle (30 degree cottons wash with super/express wash buttons down) and then stops after about 2 minutes. I've restarted it and the same happened. The plumber literally just left after checking it out following the suds backing up and the machine not draining (prob due to ktichen waste blockage, looks like it has now cleared, draining fine when he tested it.) Any ideas? It's old but has always been reliable!