Burner On neon going out High

Glow-worm Burner On neon going out Fault Code

Also written as BURNERONNEONGOINGOUT — same fault.

The Glow-worm Burner On neon going out fault code means: your boiler is failing to detect its own flame correctly, causing it to shut down shortly after trying to start.. It appears on 3 Glow-worm models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: The correct working of the flame supervision is shown by the 'Burner On' neon going out and the ignition sequence starting up. After a short period the boiler will shut down.

What causes the Glow-worm Burner On neon going out fault?

This fault happens when the boiler's internal safety system fails to confirm that a flame has successfully lit. It is usually caused by a worn-out sensor that can no longer 'see' the flame, or a fault in the control board that prevents the ignition sequence from completing. When the boiler cannot verify it is burning gas safely, it shuts down immediately as a protective measure.

Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Glow-worm models that show the Burner On neon going out fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Glow-worm Burner On neon going out fault code information on this page is sourced and cross-checked against the official Glow-worm service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026