F.62 Emergency

Glow-worm F.62 Fault Code

Also written as F62 — same fault.

The Glow-worm F.62 fault code means: your boiler has detected that the gas valve is failing to shut off correctly when it should, which means it has safely stopped operating to prevent a potential hazard.. It appears on 17 Glow-worm models in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Fault: Gas valve switch-off control
Typical repair cost £200-400 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Glow-worm models that show the F.62 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Glow-worm F.62 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 7 July 2026