PP/-- Low

Ariston PP/-- Fault Code

Also written as PP — same fault.

The Ariston PP/-- fault code means: your boiler is displaying a technical configuration menu item rather than a fault, meaning it is showing you its current internal heating power setting.. It appears on 1 Ariston model 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: Maximum thermal power for heating (expressed in a percentage of the difference between the maximum power allowed by the boiler and the minimum)

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/-- fault code

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

Source

Ariston PP/-- 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 7 July 2026