The fan in our oven has stopped going. I think this is because it has got mucky (sorry for the jargon) and finds it hard to move. Before this happened, it wouldn't start unless you reached through the back grill and tapped it with a knife.
To fix this, I intended to take the fan off and see if the nechanism was mucky. I took the back panel off and am presented with the fan with a bolt in the middle. I tried to undo this bolt, holding the fan stationary to do this. However, despite a fair amount of force, the bolt remains stubbornly in place. I don't want to overdo it. Am I doing the right thing? Does it just take a bit more muscle? ....... or should I call a professional?

David, February 2006

I don't know the model number but I have just done this job on a neff fan oven as follows, usual cautions about working safely and not alone:
1. You will need to remove the oven from surrounding cabinet. This was easy in my case: open door - locate two small crosshead wood screws set about 2-3" down from top of door frame in face of door frame.
2. The fan bolt has a left handed thread!
3. Having cleaned up the fan I found that it made no difference - the motor needs replacement. That's my NEXT job.

Rog, February 2006