BoilerFaultCodesTechnical description
Problem with fan, possibly no signal
What causes this fault?
This fault occurs when the boiler's control board sends a command for the fan to spin but does not receive the necessary speed signal back to confirm it is running safely. The most common reasons are a mechanical failure of the fan motor, loose electrical connections between the internal components, or a faulty circuit board that can no longer process data.
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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