How much does it cost to fix boiler error code RED LED LIGHT?

Typical repair cost for the boiler RED LED LIGHT fault is £180-450 including labour.

RED LED LIGHT High

Boiler Fault Code RED LED LIGHT

Also written as REDLEDLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code RED LED LIGHT appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has entered a safety lockout mode, meaning it has stopped working completely to protect the internal components. (As reported on Pro ProCombi 100HE)

Pick your boiler brand for the RED LED LIGHT fix

Pro RED LED LIGHT 1 model

Source

Information for the RED LED LIGHT 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 31 August 2026