"JohnW" wrote:

If you do decide to replace the unit, double check the
manufacturer part number against the part you buy. I
have an Indesit oven (probably identical to Hotpoint)
and ordered a fan suitable for the model number. Many
sites were showing the same fan. When it arrived, I
fitted it (a relatively simple job) but the fan shaft was too
long for the oven.

Surely a hacksaw would have been your friend?
--
Interloper