Hi, I have a quadrafire 4100, third year using it. Just this week I have been unable to get a burn going without smoke from the chimney. I am using the same wood pile, 2 years seasoned, that I have all season but am only now having a problem. I can see nice secondaries and the cheap thermometer I put on the front gets all the way up (> 700) with air control turned as low as it will go. Could this be caused by gasket leak? We have had record cold temps in the east this week. Could teal cold cause more draft such that I just can’t turn the air down enough?