We are using our Englander 28-jc insert 24/7 to supplement the furnace, and I am pretty sure the cat has plugged wity ash (again!). It is not putting out as much heat and the bypass has to be left open slightly for about an hour after a new fire or reload, or smoke comes in through the air intakes. The cat is lighting off fine, the chimney doesnt smoke after it is burning well. I am hoping somebody has a genius idea to remove the ash without shutting the stove down completely. I cleaned it before with a long, thin vacuum attachment, but the stove was completely cool. The attachment is plastic and would melt if I stuck it in there now lol... If not, I guess I will have to let it go out tonight and clean it tomorrow.