BoilerFaultCodesViessmann F.576 Fault Code
Also written as F576 — same fault.
The Viessmann F.576 fault code means: your boiler is struggling to accurately detect the temperature inside your home, so it has decided to ignore your wall thermostat and run based on its internal settings instead.. It appears on 2 Viessmann models in our database.
Technical description: Normal operation without room influence. Short circuit, room temperature sensor, heating circuit 1.
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.576 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann F.576 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