01 Medium

Chaffoteaux 01 Fault Code

The Chaffoteaux 01 fault code means: your boiler has recorded a fault, but this specific code is a generic indicator showing that an error occurred previously rather than describing a specific current problem.. It appears on 6 Chaffoteaux models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Default register code from 01 to 99 (Last default occurred)
Typical repair cost £100-200 (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 01 fault code

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

Source

Chaffoteaux 01 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 7 July 2026