How much does it cost to fix Ariston error code PUMP SAFETY DEVICE ACTIVATED?

Typical repair cost for the Ariston PUMP SAFETY DEVICE ACTIVATED fault is £150-350 including labour.

PUMP SAFETY DEVICE ACTIVATED High

Ariston PUMP SAFETY DEVICE ACTIVATED Fault Code

Q: What does the Ariston PUMP SAFETY DEVICE ACTIVATED fault code mean?

Your boiler has detected that water is not circulating correctly, which has triggered a safety shutdown to prevent the unit from overheating.

Also written as PUMPSAFETYDEVICEACTIVATED — same fault.

The Ariston PUMP SAFETY DEVICE ACTIVATED fault code means: your boiler has detected that water is not circulating correctly, which has triggered a safety shutdown to prevent the unit from overheating.. It appears on 6 Ariston models in our database.

Technical description: Differential pressure switch for pump / wiring / PCB issue

Typical repair cost £150-350 (including labour)

DIY fix possible

Check that your system pressure is between 1 and 1.5 bar on the pressure gauge.Ensure all radiator valves are fully open to allow water flow.Try resetting the boiler to see if the fault was a temporary air lock.

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Ariston models that show the PUMP SAFETY DEVICE ACTIVATED fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ariston PUMP SAFETY DEVICE ACTIVATED fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026