How much does it cost to fix Potterton error code Lights: Flash Flash On?

Typical repair cost for the Potterton Lights: Flash Flash On fault is £180-350 including labour.

Lights: Flash Flash On High

Potterton Lights: Flash Flash On Fault Code

Q: What does the Potterton Lights: Flash Flash On fault code mean?

Your boiler has stopped working because the internal component responsible for moving air and gases through the system has failed to start correctly.

Also written as LIGHTSFLASHFLASHON — same fault.

The Potterton Lights: Flash Flash On fault code means: your boiler has stopped working because the internal component responsible for moving air and gases through the system has failed to start correctly.. It appears on 3 Potterton models in our database.

Technical description: Fan Lockout. Go to Fan Lockout section of the fault finding instructions.

Typical repair cost £180-350 (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 Lights: Flash Flash On fault code

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

Source

Potterton Lights: Flash Flash On 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