Step1: Disconnect gas and electrical power and confirm oven is fully cooled before servicing.
Step2: Remove control panel and carefully detach old thermostat capillary from gas valve and sensing area.
Step3: Withdraw sensing bulb gently from oven cavity without kinking the tube.
Step4: Mount new thermostat securely and route capillary neatly to avoid heat damage.
Step5: Position bulb in correct hot-air zone and reconnect all fittings and control connections.
Step6: Restore power and gas, then test temperature range for accurate cycling and stable control.