BoilerFaultCodesChaffoteaux 08 Fault Code
The Chaffoteaux 08 fault code means: your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.. It appears on 9 Chaffoteaux models in our database.
Technical description: No water in the primary circuit
DIY fix possible
Locate the filling loop (usually a silver braided hose with one or two valves underneath the boiler)Slowly open the valve to allow water to enter the system until the pressure gauge reads between 1.0 and 1.5 barClose the valve tightly and check that the error code clears
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Chaffoteaux models that show the 08 fault code
Click a model for the full fault code list and model-specific repair notes.
- Calydra 23 Green Repair: £0-120
- Calydra 24 Green Repair: £0-120
- Calydra Comfort 100 Repair: £80-150
- Centora Green 24 Repair: £80-150
- Centora Green 30 Repair: £80-120
- Centora Green System 24 Repair: £80-120
- Centora Green System 30 Repair: £80-150
- Talia Green 25 Repair: £80-150
- Talia Green System Repair: £80-150
Source
Chaffoteaux 08 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 Centora Green 24 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026