On my Avalon Pendleton 790 when I bought it used the secondary air tube was loose and broken away from the fitting on the side of the stove. I did a repair that worked for about a month and failed. I did a much better job the second time around the end of December and have had no troubles since. I have had a bunch of problems getting a secondary burn and blamed it on the wood. Well a friend gave me a half dozen pieces from their pile that burns fine and can get close to a secondary burn even with a 500 degree stove top but just not get there. The fire starts the burn and slowly goes out over the period of 5 minutes. I am wondering if the second time I fixed it i got the holes aimed incorrectly. There is no way to align them as Avalon intended as that is the part broken. My repair is some cut pieces of steel and some hose clamps so can be rotated to any angle. Looking the manual the holes look aimed down towards the door at an approximate 45 degree angle. Currently the are horizontal aiming at the glass. Is it possible I am not getting the air where it needs to go to feed the fire when closed all way down so the fire goes out from lack of any usable air? Edit / Update I just put an ECO Brick on a deep bed of coals and let it go for a couple of minutes stove top 500F and no secondary burn from that either. I am thinking there is nothing much drier than that.