Not too expensive though at £39.74 inc VAT and delivery, if you’d like one, an email to spares@ukwhitegoods.co.uk please, remember to disconnect the oven 1st :plug:
If you’re unsure, please check repairs@ and the directories for an engineer.
There’s 2 versions of this listed – AHY3310 & AHY3320. Luckily they both use the same fan motor (0FANMTRB), but check the model number in full to make sure it’s not something other than the two above.
It may be that the impellor has seized with gunk – a bit of lube & elbow grease may do the trick.