BoilerFaultCodesTechnical description
Air fault, pressure switch, no power to fan
What causes this fault?
This fault occurs when the boiler's internal safety sensors detect that the fan isn't moving enough air to safely vent exhaust gases outside. The most common reasons are a buildup of debris in the internal tubes, a mechanical failure of the fan itself, or a faulty sensor that can no longer confirm the system is safe to fire up.
This fault is more common during periods of high wind, as strong gusts can sometimes put back-pressure on the flue, interfering with the air pressure sensor's readings.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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