Hi For the most part and not denigrating anybody else's very valid opinions, I can definitely say that in my case, the "Noises" were caused by the Fans getting slightly out of balance from collected grease etc. A good service and re- positioning of the fans on their axles always clears my noise problems. Do not forget that there are normally at least two fans, one for the Induction Coils and another smaller fan for the "Electronics". Hope this helps.

For the most part and not denigrating anybody else's very valid opinions, I can definitely say that in my case the "noises" were caused by the fans getting slightly out of balance from collected grease etc. A good service and re- positioning of the fans on their axles always clears my noise problems. Do not forget that there are normally at least two fans, one for the induction coils and another smaller fan for the "electronics".