Emergency
F.367 on Viessmann Vitodens 100-W WB1A

Your boiler has detected that a safety component responsible for gas control is failing to switch off correctly, which prevents it from operating safely.

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.

What the manual says

Manufacturer manual

Gas valve electricity supply does not turn off

From this model's manual
Verified against the Viessmann Vitodens 100 W Wb1a installation & service manual, page 89.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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.366View →F.368View →

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