Burner Lit LED Low

Glow-worm Burner Lit LED Fault Code

Also written as BURNERLITLED — same fault.

The Glow-worm Burner Lit LED fault code means: your boiler is working exactly as it should and is currently heating the water for your radiators or taps.. It appears on 4 Glow-worm models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Indicates that the burner is lit and the boiler is operating normally.

What causes the Glow-worm Burner Lit LED fault?

This is not actually a fault, but a status indicator showing that the gas valve has opened and the burner has successfully ignited. It confirms that the internal sensors have detected a flame and the boiler is now generating heat for your central heating or hot water. If this light is on, the system is performing its primary function exactly as intended.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Glow-worm models that show the Burner Lit LED fault code

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

Source

Glow-worm Burner Lit LED 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