BoilerFaultCodesViessmann 369 Fault Code
The Viessmann 369 fault code means: your boiler is starting to ignite but the flame is going out almost immediately, preventing the system from staying on.. It appears on 1 Viessmann model in our database.
Technical description: Flame lost immediately after formation (during safety time)
DIY fix possible
Check that your gas emergency control valve is fully openIf you have a prepay meter, check that you have remaining creditCheck if other gas appliances in your home (like a hob) are working correctlyPress the 'Reset' button on the boiler control panel
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Viessmann models that show the 369 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann 369 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