How much does it cost to fix boiler error code Fault 51 127?

Typical repair cost for the boiler Fault 51 127 fault is £90-180 including labour.

Fault 51 127 Medium

Boiler Fault Code Fault 51 127

Also written as FAULT51127 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fault 51 127 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's control system has detected that the wrong type of temperature sensor has been installed or configured for your hot water system. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the Fault 51 127 fix

Worcester Bosch Fault 51 127 1 model

Source

Information for the Fault 51 127 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