Gas burner flame is yellow, noisy, or lifting off the burner instead of a steady blue flame.

Safety first: Turn off the burner before inspecting. Ensure the area is well ventilated.

• Clean burner thoroughly: Remove burner cap and head. Clean all air inlets and gas ports. Ensure no cleaning products or food residues are blocking openings.
• Check cap placement: Refit the burner cap correctly; misalignment can cause yellow or noisy flames.
• Verify gas type: Confirm that the cooker is set up for your gas type (natural gas vs LPG). If recently converted or installed, check that the correct injectors were fitted by the installer.
• Ventilation: Ensure extraction and room ventilation meet Zanussi and local code requirements. Poor air supply can affect combustion.

Warning: Persistent yellow flames or soot indicate incomplete combustion and potential carbon monoxide risk. Have a gas engineer check injectors and regulator.