BoilerFaultCodesAriston Ignition Lockout Fault Code
Also written as IGNITIONLOCKOUT — same fault.
The Ariston Ignition Lockout fault code means: your boiler has stopped working because it failed to light the flame properly, so it has shut itself down as a safety precaution.. It appears on 4 Ariston models in our database.
Technical description: The boiler will signal a shut-down due to failure ignition
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ariston models that show the Ignition Lockout fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston Ignition Lockout 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