BoilerFaultCodesGlow-worm Neon6 Fault Code
Also written as NEON6 — same fault.
The Glow-worm Neon6 fault code means: your boiler has stopped working because it failed to light or stay lit when it was supposed to.. It appears on 7 Glow-worm models in our database.
Technical description: Flame failure has occured. Reset boiler by turning temperature control to Off, waiting 30 seconds and then on.
What causes the Glow-worm Neon6 fault?
This fault occurs when the boiler's internal safety system cannot detect a flame after several attempts to ignite. The root cause is usually a lack of fuel reaching the burner, a worn-out ignition spark, or a sensor that has become too dirty to 'see' the flame even if it is actually lit.
This issue is more frequent during the first cold snap of winter when components that have sat idle all summer are suddenly forced to operate under high demand.
DIY fix possible
Turn the temperature control knob to the 'Off' positionWait for at least 30 seconds for the unit to resetTurn the temperature control knob back to your desired settingEnsure there is gas reaching the property (check other gas appliances)
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Gas Safe Register →Glow-worm models that show the Neon6 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Glow-worm Neon6 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