I replaced the rollers, belt, and idler and went to start the dryer back up and right away I got a nice burning smell. When I opened up the dryer, I could see where the box that has the heating element was red hot. Should that be happening? Did I hit something while I was putting the drum back in? The burning smell I would think might be some lint that might have ended up on the elements, but who knows. Any help greatly appreciated!