Emergency
F.62 on Vaillant ecoFIT Pure 825

Your boiler has detected that the gas control system is not closing correctly when it should, which automatically stops the boiler from operating for safety reasons.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Fuel valve shut-off delay

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

F.61View →F.63View →F.64View →

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