BoilerFaultCodesWhat the manual says
Manufacturer manualFault: Fan - Fan defective or not connected
Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
What causes this fault?
This fault occurs when the boiler's control board cannot correctly communicate with or control the speed of the internal fan. The most common reason is a mechanical failure within the fan motor or a localized electrical fault on the main circuit board that prevents it from sending power to the fan. Without a spinning fan to safely clear waste gases, the boiler is forced to shut down immediately.
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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