How much does it cost to fix boiler error code 3 Red Flashes?

Typical repair cost for the boiler 3 Red Flashes fault is £90-280 including labour.

3 Red Flashes High

Boiler Fault Code 3 Red Flashes

Also written as 3REDFLASHES — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 3 Red Flashes appears across 1 boiler brand and 27 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has tried to light itself several times but cannot create a flame, meaning you will not have any heating or hot water until it is reset or repaired. (As reported on Baxi MainEco)

Pick your boiler brand for the 3 Red Flashes fix

Baxi 3 Red Flashes 27 models

Source

Information for the 3 Red 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