It's a AEG competence B2190 single oven, the electric motor that powers the cooling fan between the oven and the outer case, the one that blows hot air out the slot at the front of the oven, doesn't work, it tightens up and stops under power but spins freely when not under power!! these motors have been discontinued by AEG, is it a repair, replacement or does it really need this fan at all? any help much appreciated.

pencil neck, January 2016