Pilot will not light - 1 High

Chaffoteaux Pilot will not light - 1 Fault Code

Also written as PILOTWILLNOTLIGHT1 — same fault.

The Chaffoteaux Pilot will not light - 1 fault code means: your boiler is failing to ignite because it is not receiving any gas to create the flame needed for heating.. It appears on 2 Chaffoteaux models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Gas supply not turned on.
Typical repair cost £90-160 (including labour)

DIY fix possible

Check that your gas supply is turned on at the main meter, especially if you have recently had new appliances installed or a gas supply interruption.Ensure your gas service valve located near the boiler is in the open position.Reset the boiler using the dedicated reset button on the control panel after verifying gas supply.

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Chaffoteaux models that show the Pilot will not light - 1 fault code

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

Source

Chaffoteaux Pilot will not light - 1 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