How much does it cost to fix Saunier Duval error code 06?

Typical repair cost for the Saunier Duval 06 fault is £90-160 including labour.

06 High

Saunier Duval 06 Fault Code

Q: What does the Saunier Duval 06 fault code mean?

Your boiler's internal temperature sensor has stopped sending the correct signal, meaning the system doesn't know how hot the water is and has shut down for safety.

The Saunier Duval 06 fault code means: your boiler's internal temperature sensor has stopped sending the correct signal, meaning the system doesn't know how hot the water is and has shut down for safety.. It appears on 9 Saunier Duval models in our database.

Technical description: Central heating thermistor/wiring fault

Typical repair cost £90-160 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Saunier Duval models that show the 06 fault code

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

Source

Saunier Duval 06 fault code information on this page is sourced and cross-checked against the official Saunier Duval service / installation manuals for each affected model.

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