How much does it cost to fix Chaffoteaux error code 8.8?

Typical repair cost for the Chaffoteaux 8.8 fault is £150-300 including labour.

8.8 Emergency

Chaffoteaux 8.8 Fault Code

Q: What does the Chaffoteaux 8.8 fault code mean?

Your boiler has detected that the main gas control knob or internal valve is not moving or operating as it should, which is preventing the boiler from firing up safely.

Also written as 88 — same fault.

The Chaffoteaux 8.8 fault code means: your boiler has detected that the main gas control knob or internal valve is not moving or operating as it should, which is preventing the boiler from firing up safely.. It appears on 3 Chaffoteaux models in our database.

Technical description: Gas control tap stiff (User’s)

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 8.8 fault code

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

Source

Chaffoteaux 8.8 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