How can I remove the fan from my Bosche fan assisted oven? ?

Remove the locking washer between the nut and the fan blade,hold the shaft with a pair of pipe grips on the flat section so it cannot slip, turn the fan blade left and right repeatedly and it should gradually free up till it can spin freely on the shaft, then pull it off. If it does not free up use some WD40 but this will make it smell when you first heat it up

Kenjo
November 2014