neon flashing (1st instance) High

Potterton neon flashing (1st instance) Fault Code

Also written as NEONFLASHING1STINSTANCE — same fault.

The Potterton neon flashing (1st instance) fault code means: your boiler is failing to stay lit because it cannot detect that a flame has been successfully established.. 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: Burner extinguishes after 10 seconds. Go to section ‘I’
Typical repair cost £150-250 (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 neon flashing (1st instance) fault code

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

Source

Potterton neon flashing (1st instance) 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 7 July 2026