BoilerFaultCodesSaunier Duval 06 Fault Code
The Saunier Duval 06 fault code means: your boiler has lost the ability to accurately measure the temperature of the water being sent to your radiators, so it has safely shut down to prevent overheating.. It appears on 10 Saunier Duval models in our database.
Technical description: Central heating thermistor/wiring fault
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.
- Ecosy 24E Repair: £250-450
- Isofast Repair: £120-220
- Isofast F28E Repair: £120-200
- Isomax F30E Repair: £90-160
- Semia Condens F30 E Repair: £120-180
- Thelia Repair: £120-220
- Thelia 23E Repair: £120-220
- Thema F 30 E Plus Repair: £120-200
- Themaclassic F35E Repair: £120-220
- Themaclassic Plus F30E Repair: £120-220
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.
- Saunier Duval Ecosy 24E manual (PDF)
- Saunier Duval Isofast manual (PDF)
- Saunier Duval Isofast F28E manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026