BoilerFaultCodes 2133 High
Boiler Fault Code 2133
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2133 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is telling you that the internal water pressure is too low for it to operate safely and needs to be topped up. (As reported on Warmflow 70/90 Combi)
Pick your boiler brand for the 2133 fix
Source
Information for the 2133 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