BoilerFaultCodes 0E33 High
Boiler Fault Code 0E33
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 0E33 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is struggling to detect the temperature of the water being heated for your taps, which means it has safely shut down to prevent overheating. (As reported on Alpha Pro Tec Plus)
Pick your boiler brand for the 0E33 fix
Source
Information for the 0E33 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