BoilerFaultCodesYour boiler's fan is not spinning at the correct speed, which is preventing the system from safely clearing exhaust fumes.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Incorrect fan speed – external draught over the boiler or defective gas/air unit.
What causes this fault?
This fault occurs when the boiler's internal computer detects that the fan isn't spinning at the precise speed required to safely push exhaust gases out of the flue. The most common reason is a build-up of debris or mechanical wear within the fan motor, though it can also be triggered by strong winds blowing directly into the flue pipe from outside.
This error is more frequent during periods of extreme wind or stormy weather, as high air pressure pushing back into the flue can physically prevent the fan from reaching its target speed.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like E.01 – .11 — 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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