How much does it cost to fix Potterton error code P 3.1 or higher?

Typical repair cost for the Potterton P 3.1 or higher fault is £120-250 including labour.

P 3.1 or higher High

Potterton P 3.1 or higher Fault Code

Q: What does the Potterton P 3.1 or higher fault code mean?

Your boiler has detected that the water pressure inside the system is dangerously high while it is running, which can put unnecessary stress on your pipework and internal components.

Also written as P31ORHIGHER — same fault.

The Potterton P 3.1 or higher fault code means: your boiler has detected that the water pressure inside the system is dangerously high while it is running, which can put unnecessary stress on your pipework and internal components.. It appears on 1 Potterton model in our database.

Technical description: Pressure indicated at normal working temperatures (80 °C) is too high

Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Potterton models that show the P 3.1 or higher fault code

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

Powermax HE Repair: £120-250

Source

Potterton P 3.1 or higher fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026