BoilerFaultCodesYour boiler thinks it sees a flame even though it isn't currently firing, which is a safety conflict that prevents it from starting up.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: False flame
What causes this fault?
This fault occurs because the internal sensors detect a flame after the boiler has finished its heating cycle or before it has even started. The most common cause is a faulty ionisation electrode that is sending an incorrect signal to the control board, or a gas valve that is failing to close fully and allowing a tiny amount of fuel to stay lit.
This fault can sometimes be more frequent during periods of high humidity or heavy rain, as moisture ingress into the casing can interfere with the sensitive electrical signals of the flame sensors.
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 E00 — no call-out fees, no surprises.
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