Hello! Was wondering if anyone knows about Harman pellet stoves? I have a Harman Invincible pellet stove that has been working for several years but now will not shut down in the off mode. 1.) Turn control pot to off 2.) fire throttles way back into the throat 3.) Stove cools down. 4.) Auger feeds the slightest amount of pellets, just enough to keep it barely going. Looking for ideas before I purchase a board?