BoilerFaultCodes.com
FE94 High Lockout

Your boiler's control screen has developed a technical fault and can no longer communicate with the main system correctly.

Call an engineer soon

Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Display PCB fault.

What causes this fault?

This fault occurs when the boiler's front control panel stops speaking to the internal computer that manages heating and hot water. It is usually caused by a physical failure of the circuit board behind the screen or a loose connection in the wiring that links it to the main system. Because the boiler can no longer receive instructions or display accurate information, it shuts down as a safety precaution.

Typical repair cost £180-£350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Protect yourself from future repair bills

A boiler cover plan would cover faults like FE94 — no call-out fees, no surprises.

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