How much does it cost to fix Chaffoteaux error code Pilot will not light (3)?

Typical repair cost for the Chaffoteaux Pilot will not light (3) fault is £120-220 including labour.

Pilot will not light (3) High

Chaffoteaux Pilot will not light (3) Fault Code

Q: What does the Chaffoteaux Pilot will not light (3) fault code mean?

Your boiler is failing to ignite because internal debris is blocking the tiny gas supply line responsible for starting the flame.

Also written as PILOTWILLNOTLIGHT3 — same fault.

The Chaffoteaux Pilot will not light (3) fault code means: your boiler is failing to ignite because internal debris is blocking the tiny gas supply line responsible for starting the flame.. It appears on 2 Chaffoteaux models in our database.

Technical description: Blocked pilot filter or injector.

Typical repair cost £120-220 (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 Pilot will not light (3) fault code

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

Source

Chaffoteaux Pilot will not light (3) 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