PP/AA Low

Ariston PP/AA Fault Code

Also written as PPAA — same fault.

The Ariston PP/AA fault code means: your boiler is intentionally waiting before it tries to ignite the heating system, which is a normal protective feature to prevent it from cycling on and off too frequently.. It appears on 3 Ariston models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Heating ignition delay (expressed in min.x10)

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 PP/AA fault code

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

Source

Ariston PP/AA 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