How much does it cost to fix boiler error code Green/Red - blinking?

Typical repair cost for the boiler Green/Red - blinking fault is £150-350 including labour.

Green/Red - blinking High

Boiler Fault Code Green/Red - blinking

Also written as GREENREDBLINKING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Green/Red - blinking appears across 2 boiler brands and 10 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 that the water pump is struggling to circulate water properly, which could prevent your home from heating up or providing hot water. (As reported on Worcester Bosch 24/28/35 CDi MkII)

Pick your boiler brand for the Green/Red - blinking fix

Grant Green/Red - blinking 6 models Worcester Bosch Green/Red - blinking 4 models

Source

Information for the Green/Red - blinking 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 7 July 2026