BoilerFaultCodesViessmann F.683 Fault Code
Also written as F683 — same fault.
The Viessmann F.683 fault code means: your boiler has detected an issue with the sensor that manages the air supply to the burner, so it has safely shut itself down to prevent it from running incorrectly.. It appears on 2 Viessmann models in our database.
Technical description: Burner in a fault state, Air mass flow rate sensor faulty
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.683 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann F.683 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