I'd been having this E90 problem intermittently on washing cycle & always on cotton drying only.
I followed the blue wire loom bad connection theory & it now works perfectly.
Rooleeds, September 2011
blue wiring loom that goes to the front control board from the maim control pcb has bad connection on the user interface.clean pcb terminals and crimp connector to make connections tighter.if this doesn't work could be user interface fault or main pcb fault.
