thanks for your question
you need to repace the oven sensor
12001656 - Oven Sensor Kit 7" Long
YES THERE IS 2 SCREWS IN THE BACK OF IT IT CAN BE DONE FROM INSIDE THE OVEN
PLEASE UNPLUG THE oven firts
if this resolved your issue please accept.
Before you change the sensor, you need to check to see if the control is still showing farenheit and not celsius.
Ok good luck