have had this furnace for about 4 seasons now, we recently had a chimney fire in 20 year old double walled stainless exterior chimney. was quite scary. but my ???? is this, had a new chimney installed yesterday, and went to lit a fire last night, and got smoke out of it with lighting the kinlin, and loaded it as normal, and no smoke, after checking, i see the cleanout cap on the exterior is glowing red, as well as the thru-wall thimble on the inside, so we quickly shut the stove down. trying to figure why adding a new chimney would create more air suction into the stove when we changed no setting on the stove. we pretty much used the top push rod flue damper, and the top air damper is open approx 1 full turn, and the ash pan door is totally closed, but it was acting like a blow torch, so hot at the smoke flue. any help or advice, would be great