Your boiler's internal computer has encountered a critical electronic failure 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 main control board suffers an internal electronic failure or loses communication with its sensors. The most common reason is age-related wear on the electrical components or a sudden power surge that has damaged the delicate circuitry. Because the board can no longer safely monitor the flame or water temperature, it shuts the system down as a safety precaution.
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 HE — no call-out fees, no surprises.
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Ideal Mexico HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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