How can I fix the noisy fan in Tricity Bendix CSIE452?

The noisy fan in the oven is causing the shelves to vibrate also. I once had it looked at under the guarantee, and the technician removed the back plate from the inside and tightened some fixings. How can I do the same or anything else to reduce the noise? I do understand that I will hear the fan but this even stops conversation!
Ron Scott, January 2008


done
is it the fan in the back of the main oven that is noisy?.if so remove back panel (4 screws) and check fan blade is tight 10mm nut anti clock to tighten (reverse of normal tightening).if tightening of nut no good tighten 3 screws that mount it to oven cavity.if this no good replace fan motor

ck, January 2008
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