We have NEFF model no HDDEP31-7/FD8303 The small fan needs to be removed to replace U shaped element , but cannot see how to get to small screw behind old element ?
the fan impellor has a reverse thread nut on it, so turn it clockwise to undo it.
then the impellor should pull off unless it's siezed in which case wd40 should help.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix electric cookers.