Excessively noisy burner (1) Emergency

Chaffoteaux Excessively noisy burner (1) Fault Code

Q: What does the Chaffoteaux Excessively noisy burner (1) fault code mean?

Your boiler is burning fuel at an incorrect rate, which is causing the loud noise and indicates the mixture is not balanced correctly for safe operation.

Q: How much does it cost to fix Chaffoteaux error code Excessively noisy burner (1)?

Typical repair cost for the Chaffoteaux Excessively noisy burner (1) fault is £120-250 including labour.

Also written as EXCESSIVELYNOISYBURNER1 — same fault.

The Chaffoteaux Excessively noisy burner (1) fault code means: your boiler is burning fuel at an incorrect rate, which is causing the loud noise and indicates the mixture is not balanced correctly for safe operation.. It appears on 2 Chaffoteaux models in our database.

Technical description: Over-gassed.

Typical repair cost £120-250 (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 (1) fault code

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

Source

Chaffoteaux Excessively noisy burner (1) 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