A Illuminated continuously High

Alpha A Illuminated continuously Fault Code

Also written as AILLUMINATEDCONTINUOUSLY — same fault.

The Alpha A Illuminated continuously fault code means: your boiler has attempted to start but is unable to ignite its internal flame, meaning your heating and hot water will not work.. It appears on 3 Alpha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Burner has failed to light.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Alpha models that show the A Illuminated continuously fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Alpha A Illuminated continuously fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026