BoilerFaultCodesYour boiler has detected a problem with the internal sensor that monitors the flame, meaning it cannot confirm it is burning fuel safely and has stopped working.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Electrode/Ionization Kit Incl.key no’s 8 & 9
What causes this fault?
This fault occurs when the boiler's internal computer can no longer detect a steady flame during the ignition process. The most common reason is that the detection probes have become carbonised or worn out over time, preventing them from sending the necessary electrical signal to confirm it is safe to keep the gas on.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like E83468 — no call-out fees, no surprises.
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