High Lockout
4) on Remeha Quinta 30

Your boiler has stopped working because its internal computer settings have been incorrectly configured or corrupted.

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

Setting failure: check parameter D (first digit must be 0)

What causes this fault?

This fault occurs when the boiler's internal memory experiences a configuration error, meaning the control board no longer knows which specific model it is operating. This is usually caused by a sudden electrical surge, a failing memory chip, or a mistake made during the manual input of system settings.

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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Related fault codes

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