AA1199 Emergency

Ariston AA1199 Fault Code

The Ariston AA1199 fault code means: your boiler is still detecting a flame even after it has tried to shut off the gas, which is a significant safety concern.. It appears on 3 Ariston models in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: The flame was detected after the gas valve had closed
Typical repair cost £180-450 (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 AA1199 fault code

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

Source

Ariston AA1199 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