If the fan is working it's not the fuse.
It could be the oven control switch but it is more likely to be the oven heating element.
Go to 'www.espares.co.uk'. they sell elements (and a lot more besides) but they also have videos showing you how to replace things like oven elements.
Click on the 'advice centre' button at the top right of the home page and you will find the video in the box for cookers and all will be revealed.
Geoff, somewhere down in Wales
November 2009