BoilerFaultCodesAriston Flame failure Fault Code
Also written as FLAMEFAILURE — same fault.
The Ariston Flame failure fault code means: your boiler has failed to stay lit because it cannot detect a flame, causing the system to shut down for safety.. It appears on 1 Ariston model in our database.
Technical description: The shut-down warning light appears if the gas cock is closed while the burner is on high flame (after about 4 seconds).
DIY fix possible
Check that your gas supply is turned on at the meter.Verify if other gas appliances in your home, like a hob, are working.Press the reset button on the control panel once to see if the boiler restarts.
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Ariston models that show the Flame failure fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston Flame failure fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026