High Lockout
F68 on Ferroli BlueHelix Pro 25C

Your boiler's internal memory card or control chip is failing to communicate correctly with the main computer board.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Boiler chip card (BCC) service key fault

What causes this fault?

This fault occurs when the boiler's main control board loses its connection with the small plug-in memory chip that contains the unit's specific configuration data. The most common reason is an electrical communication failure caused by a loose connection or a faulty chip that has become corrupted over time.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

F43View →

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