BoilerFaultCodesYour boiler's fan is not spinning at the correct speed, which prevents the system from safely starting the combustion process.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Actual fan speed (Hz)
What causes this fault?
This fault occurs when the boiler's internal computer is unable to confirm that the fan is spinning at the required speed to safely clear waste gases. It is usually caused by a physical failure of the fan motor, a loose connection in the wiring, or a fault on the main control board that prevents it from reading the fan's speed correctly.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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