BoilerFaultCodesYour boiler has detected a problem with its internal fan or the power supply to it, preventing the unit from starting safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: FAN
What causes this fault?
This fault occurs when the boiler's control board detects that the fan is not spinning at the correct speed or has failed to start at all. The most common reason is that the fan motor has seized due to age, or the electrical connection between the motor and the main control board has been interrupted.
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 L8 — no call-out fees, no surprises.
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