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

Typical repair cost for the Potterton Return sensor fault is £120-200 including labour.

Return sensor High

Potterton Return sensor Fault Code

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

Your boiler has lost its ability to measure the temperature of the water returning to it, so it has shut down to prevent potential damage.

Also written as RETURNSENSOR — same fault.

The Potterton Return sensor fault code means: your boiler has lost its ability to measure the temperature of the water returning to it, so it has shut down to prevent potential damage.. It appears on 1 Potterton model in our database.

Technical description: Sensor failed open or closed circuit Replace sensor

Typical repair cost £120-200 (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 Return sensor fault code

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

Envoy 30 Repair: £120-200

Source

Potterton Return 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