How much does it cost to fix Ariston error code AA 0011?

Typical repair cost for the Ariston AA 0011 fault is £120-250 including labour.

AA 0011 High

Ariston AA 0011 Fault Code

Q: What does the Ariston AA 0011 fault code mean?

Your boiler has failed to light the flame three times in a row, so it has locked itself out to prevent a gas buildup.

Also written as AA0011 — same fault.

The Ariston AA 0011 fault code means: your boiler has failed to light the flame three times in a row, so it has locked itself out to prevent a gas buildup.. It appears on 1 Ariston model in our database.

Technical description: No flame after safety time (7 seconds)

Typical repair cost £120-250 (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 AA 0011 fault code

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

Clas One Repair: £120-250

Source

Ariston AA 0011 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