BoilerFaultCodesGlow-worm Software Error Fault Code
Also written as SOFTWAREERROR — same fault.
The Glow-worm Software Error fault code means: your boiler's internal computer brain has encountered a glitch or failure and is struggling to run its operating system.. It appears on 4 Glow-worm models in our database.
Technical description: Software Error
What causes the Glow-worm Software Error fault?
This fault occurs when the boiler's internal control board suffers a critical hardware failure or data corruption, preventing it from executing its safety checks. The most common reason is age-related degradation of the electrical components on the circuit board, which eventually stops the 'brain' of the boiler from processing instructions correctly.
DIY fix possible
Switch the boiler's electrical power supply off at the fused spur switchWait for approximately 60 secondsSwitch the power back on and see if the error clears
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Gas Safe Register →Glow-worm models that show the Software Error fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Glow-worm Software Error 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