Emergency
FC on Viessmann Vitodens 200-W B2HB-19

Your boiler has shut down because it has detected a fault with how it controls the gas supply or its exhaust route, which is a safety matter that needs a qualified engineer to check promptly.

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 train faulty, modulation valve control faulty or flue gas path blocked

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 200 W B2hb B2kb 5792013 installation & service manual.
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

F4View →F5View →F7View →

All 89 fault codes on the Vitodens 200-W B2HB-19

Seeing a different code? Every code this model can display, in one place.

9A9b9C9E9F10181920283038505158597071737475768080/EE8181/EE8282/EE838485909192939495969899A3A7A9B0b1b5b7B8bFC1C2C3C4C5CdCFd3d4d5d6d7d8E0E1E2E3E4E5E7E8E9EAEbECEdEEEFF0F1F2F3F8F9FAFbFdFEFF

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