BoilerFaultCodesTechnical description
Fan error – a fan being blocked or excessive external air pressure.
What causes this fault?
This fault occurs when the boiler's control system detects that the fan is not spinning at the correct speed or has failed to start entirely. The most common reasons are a physical blockage in the flue pipe, a build-up of debris inside the fan casing, or an electrical failure in the fan motor itself.
This error can occur during periods of high winds, as extreme gusts blowing directly into the external flue terminal can create enough back-pressure to prevent the fan from spinning correctly.
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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