Red LED Out (Lockout) High

Ferroli Red LED Out (Lockout) Fault Code

Also written as REDLEDOUTLOCKOUT — same fault.

The Ferroli Red LED Out (Lockout) fault code means: your boiler has stopped working for safety reasons and is refusing to ignite, which means it currently cannot provide any heating or hot water.. It appears on 3 Ferroli 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: Boiler lockout without sparking: check overheat stat. If sparking starts but burner does not light: check gas supply, pressure, or gas valve.
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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Ferroli models that show the Red LED Out (Lockout) fault code

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

Source

Ferroli Red LED Out (Lockout) fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026