BoilerFaultCodesYour boiler has detected a communication failure or a mechanical fault with the fan, meaning it cannot safely clear exhaust fumes and will not start.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fan Assembly c/w ‘O’Ring & Gasket
What causes this fault?
This fault occurs when the boiler's main control board loses touch with the fan or detects that it isn't spinning at the correct speed. The most common reason is that the fan motor has burnt out or seized, but it can also be caused by loose wiring connections or a failing control board that can no longer send power to the fan.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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