BoilerFaultCodesYour boiler's internal memory card or control chip is failing to communicate correctly with the main computer board.
Book a Gas Safe engineer within 24–48 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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like F68 — no call-out fees, no surprises.
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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