How much does it cost to fix boiler error code 6 Red Flashes?

Typical repair cost for the boiler 6 Red Flashes fault is £100-280 including labour.

6 Red Flashes High

Boiler Fault Code 6 Red Flashes

Also written as 6REDFLASHES — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 6 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 detected a general internal error, often linked to a small electronic glitch or a sensor that is failing to communicate correctly with the main controls. (As reported on Baxi MainEco)

Pick your boiler brand for the 6 Red Flashes fix

Baxi 6 Red Flashes 27 models

Source

Information for the 6 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