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

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

PUMP PROTECTION ACTIVATED High

Ariston PUMP PROTECTION ACTIVATED Fault Code

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

Your boiler has detected that the water pump is stuck or failing to circulate water correctly and has shut itself down to prevent internal damage.

Also written as PUMPPROTECTIONACTIVATED — same fault.

The Ariston PUMP PROTECTION ACTIVATED fault code means: your boiler has detected that the water pump is stuck or failing to circulate water correctly and has shut itself down to prevent internal damage.. It appears on 3 Ariston models in our database.

Technical description: Check/replace different pressure switch for pump, check wiring, check/replace P.C.B. wire, power supply PCB or control PCB.

Typical repair cost £150-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ariston models that show the PUMP PROTECTION ACTIVATED fault code

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

Source

Ariston PUMP PROTECTION 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