Bosch w/d wft2806gb/13

I have the full test program and fault guide fro this machine, however the machine shows no fault found! It will do the main wash, go onto the rinse, then completes the rinse, drains short spin, then dose the same rinse cycle over and over again, all day if you let it! It never moves on to final rinse. You can advance to final rinse by pushing start, it will then do the final rinse, move onto spin and finishes ok? Any one else come accrues this fault?