This my first post so bear with me. I have a Vermont Castings Encore model 2550. Great large unit but two performance issues I seek help with. First is the damper handle on the left has a mind of its own. it will spring open several times a day. It is quite anoying and seems to run much hooter when damper open thus using more wood. i have looked up there when unit is cold and can sense a spring or mechanism is not working but it is in such a strange area can't figure what is broken even looking at a schematic. Second how do you know if the unit is air tight in all spaces. even with thermosat in off type postion the stove tends to run hot and I believe it could be asir comming in through the bottom ash pan perhaps. Unit is in great shape all new linings and cleaned out once a year. Any advice on where to start would be appreciated great forum.