How much does it cost to fix boiler error code Red LED Out (Lockout)?

Typical repair cost for the boiler Red LED Out (Lockout) fault is £120-250 including labour.

Red LED Out (Lockout) High

Boiler Fault Code Red LED Out (Lockout)

Also written as REDLEDOUTLOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red LED Out (Lockout) appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working for safety reasons and is refusing to ignite, which means it currently cannot provide any heating or hot water. (As reported on Ferroli Domina 102)

Pick your boiler brand for the Red LED Out (Lockout) fix

Ferroli Red LED Out (Lockout) 3 models

Source

Information for the Red LED Out (Lockout) fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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