BoilerFaultCodesTechnical description
Offset for maximum speed
What causes this fault?
This fault occurs when the boiler's control board detects that the internal fan is unable to reach its specified maximum speed setting. It is usually caused by a communication error between the main circuit board and the fan, or an incorrect configuration value stored in the boiler's memory. This means the appliance cannot safely ramp up to its full heating power, though it may still operate at a lower capacity.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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