PCB Fault High

Potterton PCB Fault Fault Code

Also written as PCBFAULT — same fault.

The Potterton PCB Fault fault code means: your boiler has experienced an internal computer failure and has shut down for safety, meaning it will no longer provide heating or hot water.. It appears on 2 Potterton models 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: Automatic Lockout. Internal PCB failure discovered during self-check.

What causes the Potterton PCB Fault fault?

This fault occurs when the boiler's internal control center suffers a critical hardware failure or a short circuit on its circuitry. The most common reasons are electrical surges, general wear and tear of the components over time, or moisture ingress from a slow internal leak that has reached the sensitive electronic board.

Typical repair cost £250-450 (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 PCB Fault fault code

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

Source

Potterton PCB Fault 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