PILOT WILL NOT LIGHT High

Potterton PILOT WILL NOT LIGHT Fault Code

Also written as PILOTWILLNOTLIGHT — same fault.

The Potterton PILOT WILL NOT LIGHT fault code means: your boiler is failing to ignite because the small pilot flame that starts the heating process is not staying lit or will not spark.. It appears on 1 Potterton model 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: 1. Gas not turned on. 2. Air in gas line. 3. Incorrect pilot lighting procedure. 4. Electrode lead not connected to the rear of the spark igniter. 5. Incorrect spark gap. 6. Current tracking to earth. 7. Pilot injector blocked. 8. Faulty components. 9. No gas to the appliance.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Potterton models that show the PILOT WILL NOT LIGHT fault code

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

Source

Potterton PILOT WILL NOT LIGHT fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026