How much does it cost to fix Chaffoteaux error code 23?

Typical repair cost for the Chaffoteaux 23 fault is £180-350 including labour.

23 High

Chaffoteaux 23 Fault Code

Q: What does the Chaffoteaux 23 fault code mean?

Your boiler is struggling to breathe because the internal fan that moves air through the system is not spinning fast enough to light or maintain the flame safely.

The Chaffoteaux 23 fault code means: your boiler is struggling to breathe because the internal fan that moves air through the system is not spinning fast enough to light or maintain the flame safely.. It appears on 5 Chaffoteaux models in our database.

Technical description: Fan speed too low

Typical repair cost £180-350 (including labour)

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.

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026