How much does it cost to fix Chaffoteaux error code Complaints of noise - 9?

Typical repair cost for the Chaffoteaux Complaints of noise - 9 fault is £250-500 including labour.

Complaints of noise - 9 High

Chaffoteaux Complaints of noise - 9 Fault Code

Q: What does the Chaffoteaux Complaints of noise - 9 fault code mean?

Your boiler is making loud noises because internal water passages are clogged with debris, causing the system to struggle and overheat.

Also written as COMPLAINTSOFNOISE9 — same fault.

The Chaffoteaux Complaints of noise - 9 fault code means: your boiler is making loud noises because internal water passages are clogged with debris, causing the system to struggle and overheat.. It appears on 2 Chaffoteaux models in our database.

Technical description: Heat exchanger partially blocked.

Typical repair cost £250-500 (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 Complaints of noise - 9 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Chaffoteaux Complaints of noise - 9 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 27 April 2026