Our Bosch front load washing machine door was locked with flashing F34 code after I accidently turn it to DRAIN cycle instead of SPIN and changed it back, I think I must have confuse the sensor.
We turned the power off and left it alone for about 4 hours and it work again.
There is an EMMERGENCY DOOR OPEN red tap at the bottom right (where the draining/filter cleaning are),pull it down with a plier and you will be able to open the door if you must remove the laundry.
Good luck!
annschmidtvancouverbc, September 2010