Excessively noisy burner - 3 Emergency

Chaffoteaux Excessively noisy burner - 3 Fault Code

Q: What does the Chaffoteaux Excessively noisy burner - 3 fault code mean?

Your boiler is making an unusually loud noise because the fuel nozzles are obstructed or damaged, which prevents the gas from burning smoothly.

Q: How much does it cost to fix Chaffoteaux error code Excessively noisy burner - 3?

Typical repair cost for the Chaffoteaux Excessively noisy burner - 3 fault is £150-300 including labour.

Also written as EXCESSIVELYNOISYBURNER3 — same fault.

The Chaffoteaux Excessively noisy burner - 3 fault code means: your boiler is making an unusually loud noise because the fuel nozzles are obstructed or damaged, which prevents the gas from burning smoothly.. It appears on 2 Chaffoteaux models in our database.

Technical description: Burr on injectors.

Typical repair cost £150-300 (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 Excessively noisy burner - 3 fault code

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

Source

Chaffoteaux Excessively noisy burner - 3 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