How much does it cost to fix Ariston error code AA0033?

Typical repair cost for the Ariston AA0033 fault is £150-300 including labour.

AA0033 Emergency

Ariston AA0033 Fault Code

Q: What does the Ariston AA0033 fault code mean?

Your boiler has detected that the water inside the heating system has become dangerously hot and has shut itself down to prevent damage.

The Ariston AA0033 fault code means: your boiler has detected that the water inside the heating system has become dangerously hot and has shut itself down to prevent damage.. It appears on 7 Ariston models in our database.

Technical description: The heating flow temperature exceeds 105°C during operation

Typical repair cost £150-300 (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 AA0033 fault code

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

Source

Ariston AA0033 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