Bosch SMS63E12GB dishwasher. New December-2010. Won't pump out error E25. Ticking noise for a minute then stops. I've cleaned the filters and impeller from inside the dw. Can push the impeller round. Removed the left side of the unit, disconnected the pipe coming from the drain pump. Poured water through from inside and now reasonably clear. Can't see how to remove the bottom of the unit, or the metal panel behind the bottom of the door. Want to get to the pump, clean better, remove and test.