How much does it cost to fix Potterton error code Sensor Flow?

Typical repair cost for the Potterton Sensor Flow fault is £150-250 including labour.

Sensor Flow High

Potterton Sensor Flow Fault Code

Q: What does the Potterton Sensor Flow fault code mean?

Your boiler is struggling to accurately measure the temperature of the water flowing through it, so it has shut down as a precaution to prevent overheating.

Also written as SENSORFLOW — same fault.

The Potterton Sensor Flow fault code means: your boiler is struggling to accurately measure the temperature of the water flowing through it, so it has shut down as a precaution to prevent overheating.. It appears on 1 Potterton model in our database.

Technical description: Sensor Flow or return sensor out of calibration

Typical repair cost £150-250 (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 Sensor Flow fault code

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

Envoy 30 Repair: £150-250

Source

Potterton Sensor Flow 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