I have had my American Eagle wood / oil fired furnace for 8 years. I have had issues with wet or "not-so-seasoned" wood in the past, but never have I experienced the excessive creosote build up I am experiencing this year. I have tried everything I know. I started the burning season with 6-month old Ash. I thought it was green so I switched to 2-year old split Maple that had been sitting outside in a pile...but was too wet. Now I am burning White Oak and Hickory that is at least 2-year old split. I have very heavy build up inside my smoke chamber and for the very first time I actually have a gummy tar residue!
While cleaning out the furnace today, I noticed that the pipe connecting to the extension pipe with my "calibrated draft control flapper" was rusted through. Could this have anything to do with the draft control and causing the issue??? I am at a loss. I have been burning wood practically all my life and have never had so much trouble figuring what is wrong.