How much does it cost to fix Potterton error code No Fan Run?

Typical repair cost for the Potterton No Fan Run fault is £150-300 including labour.

No Fan Run High

Potterton No Fan Run Fault Code

Q: What does the Potterton No Fan Run fault code mean?

Your boiler has stopped working because it cannot detect that water is flowing through it properly, so it has shut down to prevent internal damage.

Also written as NOFANRUN — same fault.

The Potterton No Fan Run fault code means: your boiler has stopped working because it cannot detect that water is flowing through it properly, so it has shut down to prevent internal damage.. It appears on 2 Potterton models in our database.

Technical description: Lack of water, faulty flow thermistor, flow switch or control PCB fault.

Typical repair cost £150-300 (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 No Fan Run fault code

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

Source

Potterton No Fan Run 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