E08 High

Boiler Fault Code E08

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E08 appears across 7 boiler brands and 22 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal temperature sensors have developed a fault, meaning the system cannot safely monitor the water temperature and has shut down as a precaution. (As reported on Vokera Pinnacle)

Pick your boiler brand for the E08 fix

Ariston E08 7 models Biasi E08 7 models ECA E08 1 model Keston E08 2 models Potterton E08 1 model Ravenheat E08 2 models Vokera E08 2 models

Source

Information for the E08 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 31 August 2026