How much does it cost to fix Chaffoteaux error code 04/05/06/08?

Typical repair cost for the Chaffoteaux 04/05/06/08 fault is £150-350 including labour.

04/05/06/08 High

Chaffoteaux 04/05/06/08 Fault Code

Q: What does the Chaffoteaux 04/05/06/08 fault code mean?

Your boiler is struggling to move hot water around the system effectively, which is causing it to overheat and shut itself down as a safety precaution.

Also written as 04050608 — same fault.

The Chaffoteaux 04/05/06/08 fault code means: your boiler is struggling to move hot water around the system effectively, which is causing it to overheat and shut itself down as a safety precaution.. It appears on 2 Chaffoteaux models in our database.

Technical description: Temperature rise (Check main exchanger or 3 way valve)

Typical repair cost £150-350 (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 04/05/06/08 fault code

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

Source

Chaffoteaux 04/05/06/08 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