How much does it cost to fix Ariston error code AA2211?

Typical repair cost for the Ariston AA2211 fault is £120-280 including labour.

AA2211 High

Ariston AA2211 Fault Code

Q: What does the Ariston AA2211 fault code mean?

Your boiler has detected that water isn't flowing correctly through the system, so it has shut down to prevent overheating.

The Ariston AA2211 fault code means: your boiler has detected that water isn't flowing correctly through the system, so it has shut down to prevent overheating.. It appears on 3 Ariston models in our database.

Technical description: The flow switch does not close

Typical repair cost £120-280 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ariston models that show the AA2211 fault code

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

Genus 24 MFFI Repair: £120-280
Genus 27 Repair: £120-280
Genus Premium Repair: £120-250

Source

Ariston AA2211 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