BoilerFaultCodesYour boiler's internal computer has encountered a communication error or a hardware failure, preventing it from safely starting the burner.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The burner control unit, or KIM, has an error
What causes this fault?
This fault occurs when the boiler's main brain and its internal security key stop communicating with each other. It is usually caused by a hardware failure where the electronic circuit boards can no longer verify that the burner is safe to light. The boiler stops immediately because it cannot confirm it has the correct settings to operate the gas valve safely.
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 F0287 — no call-out fees, no surprises.
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