I know this model is out of date, I am having a hard time as I can only find part for model 2550 and can't get clear answers on if I can use that or how to get the damper fixed. Currently the damper keeps opening on its own (the clip in the back is bent I believe) but we have also had issues with the rod falling out of the other side of the damper before and it's just generally been a pain, can the damper rod get replaced using another models? Or the whole damper box? I'm at a loss and can't even close the damper at this point as it just immediately falls open so can't burn anything.