Low
F.57 on Viessmann Vitodens 200-W B2KF Combi

Your boiler's internal computer is not receiving or recognizing input from your wall-mounted thermostat, so it has reverted to a basic default setting to keep your home warm.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Control mode without room influence

From this model's manual
Verified against the Viessmann Vitodens 200 W B2kf Combi installation & service manual, page 88.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check if your thermostat or heating controller has power or needs new batteries.Ensure your thermostat is correctly paired or wired to the boiler's receiver.Restart the boiler using the on/off switch to force it to re-establish the connection.

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