Flash 8 times per second Medium

Boiler Fault Code Flash 8 times per second

Also written as FLASH8TIMESPERSECOND — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Flash 8 times per second 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 has been left in a service mode used for testing, meaning it is currently stuck running at a constant power level instead of operating normally. (As reported on Worcester Bosch 24si II)

Pick your boiler brand for the Flash 8 times per second fix

Worcester Bosch Flash 8 times per second 1 model

Source

Information for the Flash 8 times per second 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