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-£350 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 31 August 2026

Fault code 6 red flashes appears across 2 boiler brands and 13 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 an internal communication or unexpected component fault and has stopped working as a safety precaution. (As reported on Baxi EcoBlue Plus Combi)

Pick your boiler brand for the 6 red flashes fix

Baxi 6 red flashes 12 models Main 6 red flashes 1 model

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 31 August 2026