Ariston Red L.E.D. I illuminated Fault Code
Also written as REDLEDIILLUMINATED — same fault.
The Ariston Red L.E.D. I illuminated fault code means: your boiler has failed to start the flame after several attempts and has shut itself down as a safety precaution.. It appears on 1 Ariston model in our database.
Technical description: Ignition failure (lockout): the burner has not ignited after approximately 10 seconds, the boiler safety devices shut off the gas.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ariston models that show the Red L.E.D. I illuminated fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston Red L.E.D. I illuminated 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 27 April 2026