BoilerFaultCodesViessmann 0F Fault Code
The Viessmann 0F fault code means: your boiler is simply reminding you that it is due for its regular annual service and there is no actual fault with the system.. It appears on 3 Viessmann models in our database.
Technical description: Maintenance (only with weather-compensated control unit)
What causes the Viessmann 0F fault?
This code is triggered by the boiler’s internal timer, which tracks how many months or operating hours have passed since the last professional inspection. It is an automated reminder set by a heating engineer to ensure the system remains efficient and safe. There is no physical breakage or component failure causing this display; it is simply a proactive prompt for routine maintenance.
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 0F fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann 0F fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.
- Viessmann Vitodens 222-F manual (PDF)
- Viessmann Vitodens 242-F B2UA manual (PDF)
- Viessmann Vitodens 242-F FB2B manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026