BoilerFaultCodes E2 / 350 High
Boiler Fault Code E2 / 350
Also written as E2350 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E2 / 350 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because a sensor that measures the water temperature is reporting an impossible reading, preventing the unit from heating safely. (As reported on Worcester Bosch Greenstar i)
Pick your boiler brand for the E2 / 350 fix
Source
Information for the E2 / 350 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 7 July 2026