How much does it cost to fix boiler error code Red flashing light?

Typical repair cost for the boiler Red flashing light fault is £0-120 including labour.

Red flashing light High

Boiler Fault Code Red flashing light

Also written as REDFLASHINGLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red flashing light appears across 2 boiler brands and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has encountered a general operation error and needs to be restarted to resume heating and hot water. (As reported on Glow-worm Ci Range)

Pick your boiler brand for the Red flashing light fix

Glow-worm Red flashing light 2 models Saunier Duval Red flashing light 2 models

Source

Information for the Red flashing 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 27 April 2026