BoilerFaultCodesChaffoteaux 23 Fault Code
The Chaffoteaux 23 fault code means: your boiler has detected that the internal fan responsible for clearing exhaust gases is not spinning fast enough, so it has safely shut itself down to prevent any risk.. It appears on 9 Chaffoteaux models in our database.
Technical description: Fan speed too low
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 23 fault code
Click a model for the full fault code list and model-specific repair notes.
- Calydra 23 Green Repair: £180-350
- Calydra 24 Green Repair: £180-350
- Calydra Comfort 100 Repair: £180-350
- Centora Green 24 Repair: £180-350
- Centora Green 30 Repair: £180-350
- Centora Green System 24 Repair: £180-350
- Centora Green System 30 Repair: £180-350
- Talia Green 25 Repair: £180-350
- Talia Green System Repair: £180-350
Source
Chaffoteaux 23 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