BoilerFaultCodesYour boiler has detected an issue with the fan that safely clears exhaust gases, preventing the system from starting for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fan speed failure: check the fan and connector.
What causes this fault?
This fault occurs when the boiler's control system loses communication with the fan or detects that it isn't spinning at the correct speed to safely clear waste gases. The most common reasons are a buildup of dust and debris seizing the fan bearings, loose electrical connections, or a failure in the fan's motor.
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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