How much does it cost to fix Potterton error code Sensor Fault (Flow or Return)?

Typical repair cost for the Potterton Sensor Fault (Flow or Return) fault is £120-220 including labour.

Sensor Fault (Flow or Return) High

Potterton Sensor Fault (Flow or Return) Fault Code

Q: What does the Potterton Sensor Fault (Flow or Return) fault code mean?

Your boiler has stopped working because it is unable to accurately measure the temperature of the water circulating inside the system.

Also written as SENSORFAULTFLOWORRETURN — same fault.

The Potterton Sensor Fault (Flow or Return) fault code means: your boiler has stopped working because it is unable to accurately measure the temperature of the water circulating inside the system.. It appears on 1 Potterton model in our database.

Technical description: Mains On - OFF, Burner - OFF, Flashing Signal - Flashing 0.5 sec on 0.5 sec off

Typical repair cost £120-220 (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 Sensor Fault (Flow or Return) fault code

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

Suprima HE Repair: £120-220

Source

Potterton Sensor Fault (Flow or Return) 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