BoilerFaultCodesViessmann 361 Fault Code
The Viessmann 361 fault code means: your boiler is trying to start but cannot detect a flame, which prevents it from firing up to provide heating or hot water.. It appears on 1 Viessmann model in our database.
Technical description: Flame signal not present or insufficient at burner start
DIY fix possible
Check that your gas emergency control valve is in the 'on' position.Verify if other gas appliances in your home, such as a hob, are working correctly.If you have a pre-payment meter, ensure you have sufficient credit.Press the 'Reset' button on the boiler control panel once.
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Viessmann models that show the 361 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann 361 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