Step1: Disconnect power/gas supply and ensure appliance is cool for safety.
Step2: Remove old thermostat, noting capillary routing, wiring connections, and mounting position.
Step3: Insert new capillary bulb into sensing well and secure thermostat body.
Step4: Connect terminals according to wiring diagram and tighten securely to avoid loosening.
Step5: Restore power, test full temperature control range, and check for proper cycling operation.
Step6: Ensure all electrical connections are insulated and secure before closing the panel.