BoilerFaultCodes D3 232 High
Boiler Fault Code D3 232
Also written as D3232 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D3 232 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 An external safety device or thermostat has signaled the boiler to stop running, often due to an issue like a full condensate pump or a tripped safety switch. (As reported on Worcester Bosch 26 CDi Xtra)
Pick your boiler brand for the D3 232 fix
Source
Information for the D3 232 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