BoilerFaultCodesYour boiler is failing to detect a flame because of a communication fault between the internal electronics and the ignition component.
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 card error
What causes this fault?
This fault occurs when the boiler's main control board is unable to communicate with the ignition electrode to confirm a flame is present. The most common reason is a hardware failure within the internal circuitry or physical damage to the wiring that signals the boiler to stay alight. Because the boiler cannot verify that the gas has ignited safely, it shuts down as a protective measure.
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 A02 — 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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