Hi, i had the same problem and followed the instructions indicated here (thank you), but the problem did not go away.
So knowing that the problem is linked to WI switch or LS6 i started testing them:
- to test LS6 i did a short circuit on the conector (i.e. a wire replacing the switch), so LS6 is not the problem (this is the switch in charge of detecting water leaks on the botton of the dish washer)
- to test the water level sensor i placed the multimeter to measure impedance on the pins that are suposed to be connected when the water level rises, and then put the dishwasher on its feet, then added water manually inside until the ohmeter sais 0 ohm
- also, with the same setup i started the whasing program and i could see that the ohmeter changes to 0 ohms just before the error beep starts. => so it works OK, the problem must be somewhere else.
-then i opened the "front door" to access the control board, in order to do this i unscrewed the screws on the rigth side of the door. i looked for the connector labeled as "WI", two wires, then checked electrical continuity from the WI switch to the control board conector, one was ok but the other one was not! so i followed the cable and BINGO!, broken cable just under the door:
Then i just pulled the bottom half of the broken cable and routed it again to reconnect both halves:
and finnaly problem was solved.
So to resume:
check the wires just below the dishwaser door, it seems that they may broke due to mechanical stress during door opening/closing.
hope this helps