How do I replace the fan bearing?

Hi! I have an Actifry Classic, and it’s been getting really noisy during operation. I assume that must be from a bearing associated with the fan (given that the paddle hasn’t turned in ages - I have a new motor for that, but haven’t actually replaced it yet). Can I just replace the bearing, or is there a larger part assembly that I need to replace as a unit? (…and either way, how do I do it?) :-) Thanks!