electrical plans or schema siemens siwamat 285?

Sorry you wont be able to obtain a wiring diagram anywhere.
Check the pressure switch -the system that determines correct water level in the drum. Its a round item about 3 inches across with several wires connected, it sits under the top cover. Its an air operated switch which tells the machine water has reached the correct level. Disconnect the thin rubber pipe from the switch and blow down through it to clear any blockage. Switch itself may be faulty but its more likely the pipe is blocked.
Check out my site for info: www.2ndwave.co.uk/manual.html

washerman
March 2008