BoilerFaultCodesGlow-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.
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.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like Burner Lit LED: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
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.
- Glow-worm Micron 60FF manual (PDF)
- Glow-worm Micron 40FF manual (PDF)
- Glow-worm Micron 50FF manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026