How much does it cost to fix Potterton error code Flashing?

Typical repair cost for the Potterton Flashing fault is £150-350 including labour.

Flashing High

Potterton Flashing Fault Code

Q: What does the Potterton Flashing fault code mean?

Your boiler has detected a fault and has safely shut itself down to prevent damage, meaning you currently have no heating or hot water.

Also written as FLASHING — same fault.

The Potterton Flashing fault code means: your boiler has detected a fault and has safely shut itself down to prevent damage, meaning you currently have no heating or hot water.. It appears on 3 Potterton models in our database.

Technical description: Boiler at Lock-Out

Typical repair cost £150-350 (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 Flashing fault code

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

Source

Potterton 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