High Lockout
13 on Remeha Quinta 30

Your boiler's internal computer has encountered a critical error and can no longer control the heating system 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

Control box failure

What causes this fault?

This fault occurs when the boiler's main electronic brain suffers an internal hardware failure, preventing it from processing instructions. It is usually caused by electrical wear and tear over time or a communication breakdown between the internal circuit boards. Because the boiler can no longer monitor safety sensors or manage the flame, it shuts down completely to prevent damage.

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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