I'm new here and read through some old threads to see if I could find the answer for this. No dice. I'm hoping one of you can help. I moved my Buck Model 91 (catalytic) to my upstairs fireplace, and it reached insane temperatures for the first few weeks. The thermometer (this is for the catalytic combuster) would regularly read 1000+. I read some threads about over firing, and I'm not sure if the catalytic temperature is the same as stove temperature. If it is, I guess I have been over firing, and this is bad. If not, I liked it. Here's the problem: Over the last few days, it has been operating in more normal (and less toasty... my wife is complaining) ranges; I can't get the catalytic thermometer above 700 or so. Same wood. Same weather conditions. I'm super-familiar with the stove. The only variable is that I reseated my door gasket (I replaced it this year) to eliminate a gap I had noticed. When I try closing the door with an imperfect seal to approximate the (about 1/16") gap that I eliminated by reseating the rope door gasket, I'm not able to regain those high temps. Any thoughts? Thanks!