BoilerFaultCodes E430 High
Boiler Fault Code E430
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E430 appears across 2 boiler brands and 24 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the water pressure is too low to operate safely and has temporarily stopped working. (As reported on Potterton Assure Combi / System)
Pick your boiler brand for the E430 fix
Source
Information for the E430 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