BoilerFaultCodesYour boiler is unable to create the spark needed to light the gas because the ignition part or its wiring is faulty.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Electrode or lead damaged.
What causes this fault?
This fault occurs when the boiler's ignition system fails to generate the electrical arc needed to light the burner. It is usually caused by the metal electrode becoming worn and cracked over time, or the high-tension lead suffering from heat damage which prevents the spark from reaching the gas.
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.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like A(6) — no call-out fees, no surprises.
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