I have an Whitfield Advantage pellet stove that has run like a dream for 10+ years. Last year the stove started running for 30 minutes and shutting down. I have replace bit limits switches cleaned the stove from top to bottom. I have also sent away the control board to have it rebuilt. The stove still does the same thing runs for 30 minutes and stops. Currently I have the Exhaust fan limit switch bypassed and the stove runs continually now but at least I can use it just need to unplug to stop the stove. Any help would be appreciated......