While I try to bake/grill the cooking mode will randomly change (and beep). (e.g. From Baking to BBQ to Pizza to Traditional Mode). It's particularly the worst when I try to use the grill (BBQ/Gratin modes). Also, the modes on the dial no longer correspond at ALL with the actual cooking modes. And it's not even consistent, if "Pizza" on the dial started the BBQ, the next day it wouldn't, so it keeps changing. Lastly, if it does manage to actually stay within a baking (temperature, not %) mode, it will randomly change temperature (usually lower) many times, either every 2 minutes, or sometimes every 5-10 minutes, it varies. It sounds (from the comment above) that I should replace the Potentiometer, but could there be other parts at fault as well? Thank you.