How much does it cost to fix Chaffoteaux error code 01 to 99?

Typical repair cost for the Chaffoteaux 01 to 99 fault is £90-200 including labour.

01 to 99 Medium

Chaffoteaux 01 to 99 Fault Code

Q: What does the Chaffoteaux 01 to 99 fault code mean?

Your boiler has stored a record of a previous error that caused it to stop working, and it may need a professional to clear the history or investigate the underlying cause.

Also written as 01TO99 — same fault.

The Chaffoteaux 01 to 99 fault code means: your boiler has stored a record of a previous error that caused it to stop working, and it may need a professional to clear the history or investigate the underlying cause.. It appears on 7 Chaffoteaux models in our database.

Technical description: Last default occured

Typical repair cost £90-200 (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 to 99 fault code

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

Source

Chaffoteaux 01 to 99 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