BoilerFaultCodes A7 808 Medium
Boiler Fault Code A7 808
Also written as A7808 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A7 808 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 is struggling to accurately detect the temperature of your hot water, which means it may fail to provide a consistent hot shower or turn the hot water off entirely. (As reported on Worcester Bosch Greenstar i)
Pick your boiler brand for the A7 808 fix
Source
Information for the A7 808 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