208 Low

Boiler Fault Code 208

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 208 appears across 2 boiler brands and 24 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 set to a manual testing mode used by engineers to check emissions, which prevents it from operating normally. (As reported on Worcester Bosch Greenstar 8000 Life/Style)

Pick your boiler brand for the 208 fix

Ariston 208 1 model Worcester Bosch 208 23 models

Source

Information for the 208 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