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

Typical repair cost for the boiler Red light flashes fault is £100-280 including labour.

Red light flashes High

Boiler Fault Code Red light flashes

Also written as REDLIGHTFLASHES — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red light flashes 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 and has stopped running to protect its internal components. (As reported on Glow-worm Swift Flow 100)

Pick your boiler brand for the Red light flashes fix

Glow-worm Red light flashes 1 model

Source

Information for the Red light flashes 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