Step1: Turn off gas supply and power to the appliance and allow it to cool completely.
Step2: Access the pilot assembly area and remove the old thermopile.
Step3: Position the new thermopile so the tip sits directly in the pilot flame.
Step4: Secure the mounting and route the lead wires carefully away from heat sources.
Step5: Connect wires to the gas valve terminals as originally configured.
Step6: Restore gas and power, then light the pilot.
Step7: Check stable flame sensing and proper millivolt output for safe operation.