F.57 Low

Viessmann F.57 Fault Code

Also written as F57 — same fault.

The Viessmann F.57 fault code means: 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.. It appears on 3 Viessmann models in our database.

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.

Technical description: Control mode without room influence
Typical repair cost £80-150 (including labour)

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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Viessmann models that show the F.57 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Viessmann F.57 fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026