Step1: Turn off gas and electrical supply and allow equipment to cool completely before starting.
Step2: Remove access panel to reach the pilot assembly and existing thermocouple.
Step3: Disconnect the old thermocouple from the gas control valve.
Step4: Install the new thermocouple, routing to avoid sharp bends or heat damage.
Step5: Position sensing tip directly in steady pilot flame for proper millivolt output.
Step6: Restore gas and power, then test ignition and confirm stable flame operation.