Step1: Disconnect power supply and confirm oven is completely cool; apply lockout/tagout procedures for safety.
Step2: Remove control or access panel to reach the thermostat assembly location.
Step3: Label and disconnect all wiring from the existing old thermostat carefully.
Step4: Unscrew and remove the faulty thermostat from mounting point.
Step5: Install new thermostat ensuring probe is correctly positioned in sleeve and secure firmly.
Step6: Reconnect wiring, reassemble panel, restore power, and test safety cutoff operation.