How much does it cost to fix boiler error code 127?

Typical repair cost for the boiler 127 fault is £90-200 including labour.

127 Medium

Boiler Fault Code 127

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 127 appears across 1 boiler brand and 26 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has failed to heat the hot water tank to a high enough temperature to kill off bacteria, which is a safety routine it performs periodically. (As reported on Baxi EcoBlue)

Pick your boiler brand for the 127 fix

Baxi 127 26 models

Source

Information for the 127 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