Make sure your convection fan (fan blowing air into your ducts) filters are not plugged. I am not sure how your system is wired w/ the coal trol, but if the convection blower couldn't cool the firebox off enough, the high temp limit would have been tripped. My koker shut down on me last year two times the first week of burning until I figured out the temp limit was shutting me down. Couldn't remain in the one match club that year, but at least I knew my limit switch was working properly to protect my stove. Now I make sure I put fresh filters in at the beginning of each season regardless of how old they are.