Emergency
F.62 on Vaillant ecoTEC plus Aquaplus

Your boiler has detected that gas might still be present even after it has tried to shut off, meaning it has safely locked itself to prevent a potential hazard.

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

Flame rectification present 4 secs. after gas valve turns off | Check gas valve, burner tubes and injectors or electronics defect

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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