Your boiler’s internal computer has encountered a critical communication error and can no longer control the heating process safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: BOARD ERROR
What causes this fault?
This fault occurs when the boiler’s central control board suffers an internal electronic failure or loses the ability to talk to other sensors. It is usually caused by aged electrical components burning out or moisture getting into the casing and short-circuiting the delicate circuitry.
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 LE — no call-out fees, no surprises.
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