Step1: Turn off gas supply and allow appliance to cool completely before service.
Step2: Remove burner assembly access panel carefully.
Step3: Unscrew and remove existing orifice fitting using proper tools.
Step4: Inspect threads and clean gas port to ensure proper seal.
Step5: Install new orifice fitting and tighten securely without over-torquing.
Step6: Reassemble burner components and ensure alignment.
Step7: Restore gas supply, check all connections, and test for leaks using soapy water solution.