I am the new owner of a Quadra-Fire Classic Bay pellet stove insert. It puts out great heat, but i have notice a couple of different issues with it. After running for about 15-20 minutes, the cover/door for the ash pan with just pop open, i was wondering if that was normal. Also after it has burned pellets and the motor/fan is just running it makes loud popping noise, not very many maybe 3-4, but sounds like a balloon popping, its very loud, i was wondering if that was normal also. we have only had it for about 1 week and have cleaned it several times, but wanted to make sure these are normal things. Any help would be greatly appreciated.