Expert: Techdesk replied 4 years ago.
Hiya,
E34 indicates a fault in the door lock circuit.
Faulty door lock, faulty wiring or faulty main control board.
Try closing the door a little harder than usual.
Once closed, give it a push or thump at the door handle.
Try the machine again.
If it doesn't work, check the door latch pin.
Ensure the spring in the door is pushing it fully over.
Read more: http://www.justanswer.com/uk-appliance/43cca-bosch-xx8-washing-machine-shows-f34-screen.html#ixzz3OWF2QeEn
andy r, January 2015
