BoilerFaultCodesYour boiler has stopped working because the fan isn't starting up to safely clear waste gases from the system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Air fault, pressure switch, no power to fan
What causes this fault?
This fault occurs when the boiler's safety system detects that the fan isn't spinning fast enough to move exhaust gases out of the flue. It is often caused by a mechanical failure in the fan motor itself or a blockage in the small plastic tubes that connect to the air pressure switch. Without the fan functioning correctly, the boiler cannot safely light the flame and will shut down as a precaution.
This fault can occur more frequently during periods of high wind, as strong gusts can create back-pressure in the flue that prevents the air pressure switch from making a correct reading.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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