Step1: Turn off power and gas and allow oven to cool before starting.
Step2: Remove control panel and disconnect wiring from thermostat, noting terminals for reassembly.
Step3: Unscrew and extract faulty old thermostat bulb carefully from oven cavity without damaging capillary tube.
Step4: Install new thermostat, route capillary correctly and secure sensing bulb in original position.
Step5: Reconnect wiring to matching terminals, ensuring tight connections and no exposed conductors.
Step6: Restore power, test temperature range and check operation.