This happend to my Bosch. I corrected the problem by cleaning the drain trap (it was not very dirty) and then adding a large cup of water to give it something to drain out. Once it drained, it then went into fill mode properly. I guess it was stuck in drain mode for some reason... that I don't know.
I saved a lot of $$ on a service all since it is out of warranty.
Ted
January 2005