Gas burner will not ignite; clicking can be heard but no flame appears on one burner.

Safety first: Turn all burner knobs to OFF. Do not allow gas to flow without ignition. Ensure good ventilation.

Steps to check:

• Check gas supply: Confirm other burners light normally. If none light, the issue is with the main gas supply or safety devices.
• Clean burner: Remove the pan supports and lift off the burner cap and head. Clean all ports with a soft brush and a wooden toothpick. Do not enlarge the holes.
• Reassemble correctly: Ensure the burner head sits flat and the cap is centred. Misalignment can prevent gas from reaching the spark.
• Inspect electrode: Check the ceramic spark electrode near the burner for cracks or heavy grease. Clean gently with a non-abrasive pad.
• Test ignition: Refit parts and try lighting again. If there is still no flame but you can smell gas, turn off immediately and ventilate.
• If only this burner fails and no spark is visible: The electrode or its wiring may be faulty and should be replaced.