Does anyone else have this problem with their Hearthstone? I have the Shelburne which is one of their non-cat cast iron models, so I'm not sure if the soapstones have the same air control. Lever on the bottom left side of the stove - pull forward = max air; push back = min air. Mine gets stuck in the max position and i have to exert quite a bit of force to get it un-stuck. This weekend i had to use a small split to sort of bang it out of position. I tried to look under the stove to see if anything was getting jammed in the mechanism, but couldn't see anything and couldn't investigate too much because the stove was pretty hot. Could it be something in the firebox that is impeding the movement? Ashes where they are not supposed to be? Bad air control design?