BoilerFaultCodes IPX4D High
Boiler Fault Code IPX4D
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code IPX4D 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 This code indicates that your boiler has detected a potential issue with its weatherproofing or electrical integrity, meaning it has automatically shut down to prevent a short circuit or damage. (As reported on Main Combi 24)
Pick your boiler brand for the IPX4D fix
Source
Information for the IPX4D 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