try tilting the machine to a 45 degree angle. Often a switch blocks in the drainage part of the system, and this works to clear it. Turn the machine of on the machine, tilt it, then turn it on again. If they are still flashing, try again. My machine does the self same thing, and when it restarts, i run it through with the A wash which seems to clear the pipes out.
Best of luck
Mark, January 2008
