Our Castille Pellet stove is acting funny. First of all we occasionally have a flashing orange light. We don't know what that is & it says nothing in our owner manual. The stove will be running & then just quit feeding pellets. Sometimes it just won't start at all. Reset doesn't do anything. The only way to get it going again is to unplug it & plug it back in. Does anyone have any ideas as to what the problem may be?