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

Typical repair cost for the Potterton Flow sensor fault is £120-220 including labour.

Flow sensor High

Potterton Flow sensor Fault Code

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

The boiler is failing to register that water is moving through the pipes, so it has stopped heating to protect itself from overheating.

Also written as FLOWSENSOR — same fault.

The Potterton Flow sensor fault code means: the boiler is failing to register that water is moving through the pipes, so it has stopped heating to protect itself from overheating.. It appears on 1 Potterton model in our database.

Technical description: Flow sensor is incorrectly fitted Check sensor

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 Flow sensor fault code

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

Envoy 30 Repair: £120-220

Source

Potterton Flow sensor 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