Fans are fitted to both fan-assisted and convection type ovens. The function of the fan is to circulate the heat produced by the elements at the top and bottom of your oven (or the circular element, if it has one).
If you can see that the impeller is no longer turning, this means the fan mechanism is probably faulty.
Fan broken or faulty? Quickly replace it by ordering the right model to fit your oven on our website.