Same problem on a DWH B10, but thought I'd try cleaning from inside before removing the builtin dishwasher. Toothbrush used to clean it from the inside after removing the metal grate and all sorted! 2 minute job and now working perfectly
Turned out that the hose was blocked with junk near the outlet to the sink waste. I cleaned that out and "Hey Presto!", the machine now works.
Thanks very much once again.
(...)
- I put the dishwasher on its back.
- Removed the front metal panel, then the bottom metal panel.
- If the dishwasher is lying on it's back on the right hand side of the bowl there is a round approximately 3cm wide white plastic valve with an electrical wire connection coming out of it.
- Disconnect the wire.
- Had to turn the valve clockwise a quarter turn to remove and hold down a latch. Had to turn it quite hard.
- Couldn't get the valve out because a black hose was blocking it so I removed the hose.
- Had to pry off carefully a black cover to the valve. This black cover is what is exposed and can be seen inside the dishwasher at the bottom of the bowl.
- It was clogged up with white gunk.
- Cleaned the round rubber membrane which keeps the water out of the switch.
- on the inside of the rubber membrane there was some sticky grease. I think this was to seal the membrane. Now that I think about it I should have spread it around the membrane when I put it back.
- put the valve back together
- connected the electrical connection.
- put back the metal panels
And now the machine works again and we cancelled the repairman who was coming to fix it.
Total time was about 30 - 45 minutes.