BoilerFaultCodesTechnical description
Fan or fan wiring fault.
What causes this fault?
This fault occurs when the boiler's control system cannot confirm that the fan is spinning at the correct speed to safely expel exhaust fumes. The most common reasons are a mechanical failure within the fan motor itself or a break in the electrical communication between the fan and the main control board. Without a functional fan, the boiler will refuse to ignite to prevent dangerous gases from building up inside the unit.
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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