08 High

Boiler Fault Code 08

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 08 appears across 7 boiler brands and 64 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because a specific safety sensor on the burner has detected that it is getting too hot. (As reported on Vokera Mynute 28E / 35E)

Pick your boiler brand for the 08 fix

Alpha 08 23 models Chaffoteaux 08 6 models Glow-worm 08 5 models Remeha 08 2 models Saunier Duval 08 8 models Viessmann 08 7 models Vokera 08 13 models

Source

Information for the 08 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