We put in a new catalyst combustor in our Blaze King KEJ-1101 & the thermostat now goes from one side to the other & not just in the 1-3 area. It is also smokey when opening the front door. There is smoke & fire going through the pipe outside. What should the flap look like inside the thermostat area. There is a screw that will stop the flap to not open more & can not find a picture of that area.