P.06 Low

Heatline P.06 Fault Code

Also written as P06 — same fault.

The Heatline P.06 fault code means: your boiler is currently performing a brief automatic procedure to remove trapped air from the internal system to ensure efficient circulation.. It appears on 7 Heatline 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: Venting the installation

DIY fix possible

Wait 5-10 minutes for the automatic venting cycle to completeMonitor the boiler display to see if the code clears automaticallyIf the code persists, check that your system pressure is at the recommended 1.0 to 1.5 bar level

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Heatline models that show the P.06 fault code

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

Source

Heatline P.06 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026