BoilerFaultCodesFirebird RED LIGHT Fault Code
Also written as REDLIGHT — same fault.
The Firebird RED LIGHT fault code means: your boiler has stopped working because it failed to light or stay lit, triggering a safety shut-off to prevent any issues.. It appears on 2 Firebird models in our database.
Technical description: Burner Lock-out. Activated when lighting or due to a fault with the burner or its safety control system.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Firebird models that show the RED LIGHT fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Firebird RED LIGHT fault code information on this page is sourced and cross-checked against the official Firebird service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026