I just had my dealer come out and replace my control board on dec 22nd. Now I am trying to shut it down to clean it, and it won't stop feeding. I set the fan at off. then i set the temp all the way down and the feed rate all the way down. I let it run for 2 hours and it is still feeding. It won't stop. I now just flipped the switch to manual, and still nothing. Is there a dip switch that is wrong, or do you think I got a bad board from Harman?