Hi Charlotte
I would hope you have this fixed by now but in the spirit of spreading the word..
Your problem is likely to be the Oven Element, the way to tell is that everything else works (fan, grill, light, thermostat lamp) but you get no heat on teh oven setting.
If you google Belling element replacement you'll get the names of several suppliers and can get a new element for around £20.
If you want to know how to replace it hit me back.
Nigel
Nigel H, June 2007
