High Lockout
HE on Ideal Classic FF

Your boiler's main control computer has developed an internal electrical fault and can no longer manage the heating process safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 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 internal computer chips or electrical circuits suffer a hardware failure, meaning the brain of the appliance can no longer process data or send signals. The most common reason is general age-related wear on the circuit board's components, or occasionally an electrical surge that has damaged the delicate tracks. Because the board can no longer guarantee the boiler is operating safely, it automatically shuts the system down.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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