A while back, I posted some questions about my chimmney, and the creosote that I removed when cleaning it. I did not manage to clean the pipe that connects my boiler to the metalbestos chimmney because it was cold, and I didn't want to shut down my boiler to allow cleaning this pipe. One poster replied that I should "do it now" because when a problem arises, it will be on the coldest day of the year. Well, yesterday it was 9 degrees here, and windy. I came home from work and decided to get my morning fire ripping, as I usually do. Well, once I got the boiler fully loaded, and opened her up, I began to notice that a freight train was coming down my chimmney.....at least that's what it sounded like. I then noticed that the pipe that I had neglected to clean was glowing cherry red. I immediately shut down the draft fan, closed all air sources, and blasted a fire extinguisher into the barometric damper hole. I was able to put the fire out pretty quickly, but I then spent the next 3 hours removing burning logs from the boiler, and removing and cleaning the pipe. I had my neighbor (a firefighter) come and inspect the chimmney to make sure that I hadn't damaged it. He said it all looked fine, and that it really wasn't nearly as dirty as many that he has seen. I then got it all back together, and all is good once again. I just wanted to say "Thank you" to those that warned me, and also to share my lesson learned. This could have turned out much worse. Merry Christmas folks.