BoilerFaultCodes 351 E2 High
Boiler Fault Code 351 E2
Also written as 351E2 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 351 E2 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 lost its connection to the component that detects when water is flowing through the system, so it has shut down as a precaution to prevent overheating. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the 351 E2 fix
Source
Information for the 351 E2 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