I can't turn down the airflow on my 2008 Alderlea T5 enough. Door gasket seems good. Just put in new door glass and gasket since glass had cracked and glass gasket was leaking air. Thought that would solve my air flow problem. It made it better but still can't slow down the flow as much as when new. I've inspected things and don't see anything warped from overheating and the damper seems to be working right but I can't restrict the incoming air as much as I'd like to control the fire. When new I could shut damper far enough to slow the fire down to a simmer but now even shutting the damper down all the way I get more of a burn than I'd like. Makes me careful not to add much fuel at a time as afraid it might burn to fast and hot. Any ideas appreciated on how to deal with this.