All neons flashing High

Potterton All neons flashing Fault Code

Also written as ALLNEONSFLASHING — same fault.

The Potterton All neons flashing fault code means: your boiler has detected a system error or internal failure that is preventing it from starting up correctly.. 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: If regular resetting is required or appliance still does not operate, investigation is necessary.

What causes the Potterton All neons flashing fault?

This fault occurs when the boiler's internal computer, the Printed Circuit Board, suffers an electrical failure or loses communication with its sensors and switches. The most common reason is age-related wear to the board's components or loose connections in the wiring that prevent the boiler from performing its safety checks.

Typical repair cost £180-450 (including labour)

DIY fix possible

Turn the selector switch to the 'Reset' position and hold for at least 5 secondsReturn the switch to the heating or hot water positionCheck that your gas pre-payment meter (if applicable) has credit

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Potterton models that show the All neons flashing fault code

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

Source

Potterton All neons flashing 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