BoilerFaultCodesChaffoteaux 10 Fault Code
The Chaffoteaux 10 fault code means: your boiler is currently unable to sense the temperature of your hot water properly, which means it has stopped heating it to prevent the system from overheating.. It appears on 9 Chaffoteaux models in our database.
Technical description: Domestic Hot Water thermistor faulty (short circuit)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Chaffoteaux models that show the 10 fault code
Click a model for the full fault code list and model-specific repair notes.
- Calydra 23 Green Repair: £90-160
- Calydra 24 Green Repair: £90-160
- Calydra Comfort 100 Repair: £120-180
- Celtic 2 24 Rsc Repair: £150-300
- Centora Green 24 Repair: £120-200
- Centora Green 30 Repair: £120-180
- Sterling FF Repair: £120-250
- Talia Green 25 Repair: £120-200
- Talia Green System Repair: £120-200
Source
Chaffoteaux 10 fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.
- Chaffoteaux Calydra 24 Green manual (PDF)
- Chaffoteaux Calydra Comfort 100 manual (PDF)
- Chaffoteaux Celtic 2 24 Rsc manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026