BoilerFaultCodes.com
2928 High Lockout

Your boiler's internal computer has encountered a software or hardware error that is preventing it from running properly.

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: Internal fault

What causes this fault?

This fault occurs when the boiler's central control system suffers a communication breakdown between its internal electronic components. It is typically caused by a critical failure within the main circuit board or the digital display unit, meaning the boiler can no longer safely manage the heating process. In some cases, a sudden power surge or moisture ingress can damage these sensitive parts, leading to a complete system freeze.

Typical repair cost £180-450 (including labour)

DIY fix possible

Locate the Reset button on the boiler's front control panel.Press and hold Reset for three seconds.Wait for the boiler to complete its restart sequence to see if the error clears.

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Protect yourself from future repair bills

A boiler cover plan would cover faults like 2928 — no call-out fees, no surprises.

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