Gas burner lights but the flame is yellow, noisy, or lifting off the burner.

Safety first: Turn off the burner and allow it to cool. Shut off gas supply if removing injectors.

• Clean burner: Remove burner cap and head. Clean all ports and surfaces to remove grease and debris. Ensure the underside of the cap is clean where it meets the head.
• Check gas type: Verify that the appliance is configured for your gas type (natural gas or LPG) as indicated on the rating plate. If not, a Gram conversion kit with correct injectors must be installed by a gas technician.
• Inspect injectors: With gas off, remove the burner head and visually inspect the injector (jet). Ensure it is not partially blocked. Do not enlarge the orifice.
• Air adjustment: Some models have adjustable air shutters on the burner tubes. Adjust according to the service manual to achieve a stable blue flame without lifting or yellow tips.

Warning: Incorrect combustion can produce carbon monoxide. If you cannot achieve a proper flame, stop using the appliance and call a qualified gas fitter.