BoilerFaultCodesAriston 5P6 Fault Code
The Ariston 5P6 fault code means: your boiler is struggling to light its flame successfully on the first few attempts, which may eventually lead to it shutting down completely.. It appears on 3 Ariston models in our database.
Technical description: Ignition failed (non-blocking)
DIY fix possible
Check that your gas meter has credit (if on prepay)Ensure other gas appliances in your home, like the hob, are working correctlyPress the 'Reset' button on the front control panel
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Ariston models that show the 5P6 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston 5P6 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