BoilerFaultCodesGlow-worm Reset neon Fault Code
Also written as RESETNEON — same fault.
The Glow-worm Reset neon fault code means: your boiler has safety-tripped and needs a manual restart to clear a temporary glitch or overheating issue.. 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 fault?
This fault occurs when the boiler's internal safety sensors detect that the unit has become too hot or has failed to light correctly. The most common reasons are a temporary interruption in the gas supply, a build-up of internal heat due to a pump failure, or a worn-out component that can no longer detect the flame.
This issue often surfaces during the first cold spell of autumn when the boiler is pushed to work harder after sitting idle throughout the summer.
DIY fix possible
Turn the boiler temperature control knob to '0' (the off position).Wait for at least 30 seconds for the internal components to reset.Turn the knob back to your desired temperature setting and follow standard lighting procedures.
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Gas Safe Register →Glow-worm models that show the Reset neon fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Glow-worm Reset neon 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