Re: Baumatic BDW13 error code E4.
The following worked for me – but it took 4 days!
UNPLUG THE MACHINE!!
Undo the salt dispenser lid and remove the filters.
Using a cloth – dip it into every conceivable “nook and crannie” to get out as much water as possible (the pump gets it out of the filter drain).
A small syphon may work better on the water in the salt dispenser.
I tried to keep the door open as much as possible – basically to get rid of any water by evaporation etc.
I turned it on each day to see whether the error had gone.
Today it had – no service fee involved – but had to do the washing up by hand for 4 days.
The people on the technical help line were insistent that this could only be fixed by a technician.
Hope this helps someone else.