Gas cooktop burner clicks and sparks but the flame does not light or lights and then goes out when the knob is released.

Safety: Turn off gas if you smell unburned gas. Ventilate the area and avoid flames or sparks.

• Seat burner parts: Remove the burner cap and head, clean them, and ensure they are correctly positioned on the base. Misalignment can prevent proper ignition.
• Clean ports: Use a soft brush or wooden toothpick to clear clogged gas ports. Do not use metal objects that can enlarge the holes.
• Bleed air: After a new installation or gas interruption, hold the knob in the ignition position for several seconds to allow gas to reach the burner, then ignite.
• Hold knob longer: For burners with thermocouples, keep the knob pressed for 5–10 seconds after ignition to allow the sensor to heat. If the flame still goes out, the thermocouple may be weak and should be replaced.