BoilerFaultCodesYour boiler has stopped working because the internal fan is not spinning at the correct speed or the system cannot communicate with it.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Incorrect signal from fan
What causes this fault?
This fault occurs when the boiler's main control board sends a request for the fan to spin, but the fan either fails to move or cannot report its speed back correctly. The most common reasons are a buildup of dust and debris seizing the fan bearings, a loose connection in the internal wiring, or a failure in the electronic components that control the motor.
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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