Today my combustion blower wouldn't turn. After removing the firebrick replacement that I made (to access the fan blades) it fell over and broke into 4 pieces. Then there was an area-wide power failure. Hours later when it was restored, I cut a new firebrick middle piece from a section of hardi-plank. After putting it all back in place, the blower couldn't turn freely. It turns a bit but then makes a moaning/rubbing sound for less than a second as some friction slows the impeller. Then it turns faster for a second or two and it happens again, repeating the pattern. I shot a short video of it but I think you get the idea. So I assume I'll need to remove the blower and dismantle it to clean or replace the bearings, but I don't have a clue about the correct method to remove the blower. It seems that the blower needs to be removed with the vent tube still connected to it because there isn't any room to remove it with the tube in place. Things are quite tight in there for the exhaust blower. Since my stove is the Advantage I, it's put together with everything arrange in reverse from the II, (and III i assume) -controls, damper on the left, exhaust on the right, but maybe it's pretty similar other than that. But I can't tell if the vent section that attaches to the blower is welded to the housing or not. Could someone tell me which nuts to remove and whether or not I right about having to remove the vent tube section while it's attached to the blower. Thanks