Pardon my higorance, guvvner, but it sounds a bit like you may not have had the grille off & checked for free rotation as per my earlier post. Tell me if I am wrong.
If both fans were seized with crap, they may simply want a free up & a lube. I should think they would be a low starting torque motor so it may not take much to stop them starting, if yer get my drift.:D
Are you shaw they have been looked at?:)
Thank goodness we have some decent smilies back.;)

