So I finally decided to replace my convection blower in my Quad Castile insert. The past couple of years, it's been very noisy especially when cooling down. I didn't think anything was wrong with it because it still worked and it was just vibrating against the stove. I thought maybe the bearings were going and throwing it off balance because the sound would come and go. Anyhow, I replaced the blower and voila, no more noise. Yay! However, now one of my snap discs keeps tripping which I'll post in another thread.