Step1: Shut off gas and power to the appliance and allow it to cool.
Step2: Remove burner access panel to reach pilot assembly.
Step3: Disconnect old thermopile leads and carefully remove probe.
Step4: Install new thermopile in same mounting position near pilot flame.
Step5: Route leads to gas valve and reconnect securely to correct terminals.
Step6: Ensure probe is properly positioned in steady pilot flame.
Step7: Restore gas and power, then check stable flame and proper millivolt output operation.