BoilerFaultCodesYour boiler has reverted to its original factory settings and needs its specific configuration data entered to work correctly with your heating system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Factory setting
What causes this fault?
This fault occurs when the boiler's internal computer loses the specific identity code that tells it which model it is. It most commonly happens after a power surge or when a major electronic component, such as the circuit board, has been replaced but not yet programmed. Without this configuration data, the boiler stays in a 'factory default' state and won't ignite for safety reasons.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like D.96 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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