F.575 Low

Viessmann F.575 Fault Code

Also written as F575 — same fault.

The Viessmann F.575 fault code means: your boiler is no longer receiving temperature readings from your wall-mounted room controller and has defaulted to running based on internal settings instead.. It appears on 2 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: Normal operation without room influence. Lead break, room temperature sensor, heating circuit 1.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Viessmann models that show the F.575 fault code

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

Source

Viessmann F.575 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 7 July 2026