BoilerFaultCodesGlow-worm Reset neon lights Fault Code
Also written as RESETNEONLIGHTS — same fault.
The Glow-worm Reset neon lights fault code means: your boiler has safety-tripped and simply needs a manual restart to try and fire up again.. It appears on 3 Glow-worm models in our database.
Technical description: If the reset neon lights, turn the boiler temperature control to '0' (off), wait 30 seconds, then repeat the lighting instructions.
What causes the Glow-worm Reset neon lights fault?
This fault occurs when the boiler's internal safety sensors detect that the unit has become too hot or has failed to light after several attempts. The most common reasons are a temporary interruption in the gas supply, a build-up of debris on the ignition components, or a lack of water circulation preventing the heat from escaping the heat exchanger.
This issue often appears during the first cold spell of autumn when the boiler is pushed to work harder after being mostly idle over the summer.
DIY fix possible
Turn the boiler temperature control knob to the '0' position.Wait for at least 30 seconds.Turn the control knob back to your desired temperature setting to restart the ignition sequence.
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Gas Safe Register →Glow-worm models that show the Reset neon lights fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Glow-worm Reset neon lights 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