How much does it cost to fix Chaffoteaux error code 40 60 70?

Typical repair cost for the Chaffoteaux 40 60 70 fault is £150-300 including labour.

40 60 70 High

Chaffoteaux 40 60 70 Fault Code

Q: What does the Chaffoteaux 40 60 70 fault code mean?

Your boiler has failed to start its internal fan, which prevents it from safely igniting and providing heating or hot water.

Also written as 406070 — same fault.

The Chaffoteaux 40 60 70 fault code means: your boiler has failed to start its internal fan, which prevents it from safely igniting and providing heating or hot water.. It appears on 2 Chaffoteaux models in our database.

Technical description: Extractor off and pressure regulator at rest

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 40 60 70 fault code

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

Source

Chaffoteaux 40 60 70 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