BoilerFaultCodes E2 233 High
Boiler Fault Code E2 233
Also written as E2233 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E2 233 appears across 1 boiler brand and 9 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 internal thermometer that measures the temperature of the water heading to your radiators, causing it to stop following your heating demands. (As reported on Worcester Bosch 30i Junior)
Pick your boiler brand for the E2 233 fix
Source
Information for the E2 233 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