How much does it cost to fix boiler error code H08?

Typical repair cost for the boiler H08 fault is £90-130 including labour.

H08 Low

Boiler Fault Code H08

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code H08 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has reached its programmed service interval and is kindly reminding you that it is time for a routine professional safety check. (As reported on Worcester Bosch Greenstar i)

Pick your boiler brand for the H08 fix

Worcester Bosch H08 2 models

Source

Information for the H08 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