BoilerFaultCodesYour boiler has stopped working because the fan that removes waste gases is not spinning correctly, causing the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fan Fault
What causes this fault?
This fault occurs when the boiler's control system detects that the fan is not spinning or is rotating at the wrong speed to safely clear waste gases. The most common reason is a mechanical failure within the fan motor or a communication error between the fan and the main circuit board. Without the fan functioning correctly, the boiler cannot safely ignite and will shut down as a precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like F03 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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