BoilerFaultCodes PUMP SAFETY DEVICE ACTIVATED High
Boiler Fault Code PUMP SAFETY DEVICE ACTIVATED
Also written as PUMPSAFETYDEVICEACTIVATED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code PUMP SAFETY DEVICE ACTIVATED appears across 1 boiler brand and 6 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 water is not circulating correctly, which has triggered a safety shutdown to prevent the unit from overheating. (As reported on Ariston Euro Combi 30 MFFI)
Pick your boiler brand for the PUMP SAFETY DEVICE ACTIVATED fix
Source
Information for the PUMP SAFETY DEVICE ACTIVATED 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