The spill-off reservoir, which is located at the bottom, features a sensor, which is activated every time it accumulates excess water. The sensor signals the system to display the F6E4 error.

If there is F6 on the display, most likely, water is not getting into the machine, because it is not connected to the source of water. If there is F4 on the display, the reservoir is overfilled.

In other words, there is no more room for water in the machine.

Fixing it

1. Check the inside of your dishwasher. Make sure the salt and filter areas are moderately dry. It is advisable to clean the inside, as long as you have such an opportunity.
2. The trickiest, yet the most necessary part of it is getting your dishwasher out of the cabinet. This may take a bit of preparation. Unplug the device (this must be the first thing to do!), then disconnect the inlet and outlet hoses. Slide the dishwasher out very carefully.
3. To drain the reservoir, tilt the dishwasher backwards. Make sure there are buckets, tubs and towels close at hand, because you may pretty much flood your kitchen.
4. Once you are done, slide the dishwasher back into the cabinet. Reconnect all hoses and the power.
5. Run the short P2 cycle and do r put in any dishes or silverware.