How much does it cost to fix Heatline error code S.97?

Typical repair cost for the Heatline S.97 fault is £150-250 including labour.

S.97 High

Heatline S.97 Fault Code

Q: What does the Heatline S.97 fault code mean?

Your boiler has detected that the water pressure sensor is not working properly, which has triggered a safety shutdown to prevent damage to the system.

Also written as S97 — same fault.

The Heatline S.97 fault code means: your boiler has detected that the water pressure sensor is not working properly, which has triggered a safety shutdown to prevent damage to the system.. It appears on 8 Heatline models in our database.

Technical description: Water pressure sensor control, DHW and CH is in blockage

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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Heatline models that show the S.97 fault code

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

Source

Heatline S.97 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026