Okay, so last night the fan in our creda fan oven finally gave up the ghost.
Recently, it has been prone to "getting stuck" and requring a plastic implement poked through the slots at the back to get it started.
However, it now seems to spin free when prodded by hand but does not spin of its own accord at all. And as any fule no a fan oven with no working fan is actually worse than a non-fan oven due to the position of the heating element.
So, can anyone suggest any likely causes, before I take the thing apart?