damper on my stove is stuck open...thank god i hadnt banked it down full of wood for the night...not a whole lot fuel to burn off...but ill be up for another hour or 2 monitoring it...i have an older shenandoah fp-i wood insert.has the lever type damper u push up to open and push down to close it...i went to close it and it felt like there was no pressure at all...knew something wasnt right...is there a spring in there?..i figure there is but not sure....anyone know where i could get this part?