I have owned the 5500 xl for three seasons now and I think during that time, I've only had it running well for two or three months before it started acting up. My issues began shortly after running it in the beginning and finding that it just wasn't putting out enough heat. After changing to a better hard wood pellet, we noticed a better heat range but different issues such as; lots of soot on the glass, unburned pellets in the burn pot after only a two day burn. I've worked with US stove on the phone and have tried numerous changes to settings but they keep telling me that there must be some sort of issue with the draft blockage but there is none. I have paid to have someone come out and clean the stove because I assumed there was something I wasn't doing right. Not the case. I have cleaned the fins, the piping completely, the entire burn pot area and even taken off the entire back section to clean it so well that it looked as good as new. Can anyone give me some suggestions on how to get the stove to exhaust better so that I don't have to shut the stove down constantly? When it does run well, it pushes out a great amount of heat but when it clogs, it's absolutely pointless to run. I have the old A B C panel and I'm wondering if I need to replace the exhaust blower? Thanks!