Frozen Oven Control Knob on Atwood Wedgewood Oven

Thanks for all the expert help, as usual. We are not going to mess with this jammed oven thermostat control knob and will order a replacement and have it professionally installed. I appreciate all the advice. The part is still available from ebay for about $48. One poster had asked me to explain what I meant by "frozen" Clearly, our rig is not below 32 degrees and its actually not frozen. I would say its jammed, stuck, unworkable, unmoveable, kaput, and malfunctioning. Our appreciation again.