Emergency
16 on Saunier Duval Thema F 30 E Plus

Your boiler has detected a failure in the system that controls the flow of gas, meaning it is no longer safe to operate and has shut down to prevent a risk.

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

Gas safety valve failure

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

17View →18View →

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