810 High

Boiler Fault Code 810

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 810 appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently unable to provide hot water, meaning you will likely have cold taps and a cold shower until the fault is corrected. (As reported on Worcester Bosch Greenstar 8000 Style)

Pick your boiler brand for the 810 fix

Source

Information for the 810 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