BoilerFaultCodesYour boiler has stopped working because the fan that clears exhaust gases is not spinning at the correct speed.
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 too low – check the fan harness and connector
What causes this fault?
This fault occurs when the boiler's control system detects that the fan is not spinning fast enough to safely clear waste gases from the flue. The most common reasons are a build-up of dirt within the fan housing, worn-out bearings that prevent the motor from turning freely, or a loose electrical connection between the fan and the main control board.
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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