How much does it cost to fix boiler error code Fault 50 126?

Typical repair cost for the boiler Fault 50 126 fault is £120-280 including labour.

Fault 50 126 Low

Boiler Fault Code Fault 50 126

Also written as FAULT50126 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fault 50 126 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 solar heating system has stopped working properly because either air is trapped in the pipes or the circulation pump has become stuck. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the Fault 50 126 fix

Worcester Bosch Fault 50 126 1 model

Source

Information for the Fault 50 126 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