Disconnect the power from the oven.
Move the oven out away from the wall.
Remove the two screws from the top of the back panel that hold the back panel to the body of the oven. Lift the back cover up and then remove it from the oven unit.
Unplug the oven temperature sensor wire connector by depressing the connector lock tab with your fingers and then pulling off the connector.
Remove the two screws holding the sensor bracket to the back wall of the oven. Remove the sensor.
Insert the new sensor into the hole in the back wall of the oven.
Reverse the disassembly procedure to install the new sensor.