Bloomfield Pottery

Do I have to use the timer-dial with this kiln? I put it on 13 hours, with a cone 6 cone placed in the automatic shut-off mechanism, and it never reached temperature after 13 hours. I'm firing it again with the dial set to 20 hours. that seems excessive for a cone 6 firing. Any thoughts? Also, is it possible for a new kiln to NOT go up to cone 6? it had never been used, and I followed all directions for first (clear) firing, etc....