What would cause smoke to come out of the stove's convection air tubes and vents during startup? Is there an internal joint or seal that can fail over time due to repeated heat up/cool down cycles? The most likely cause, of course, is combustion smoke leaking external to the stove getting pulled through the convection air intake, but I've confirmed there are no significant external leaks that would produce that amount of smoke from the convection vents. This occurs after lighting but before turning the stove on. After it's on, there isn't nearly as much leakage but I can tell that there is still a small amount because my throat gets irritated after couple of hours. The door and ash pan seals seem fine and that's not where the startup smoke comes from, which is definitely from the convection vents.
Thanks for all ideas,
Ken
Thanks for all ideas,
Ken