High
04 on Remeha Quinta 30

Your boiler has detected an internal electrical problem and has safely shut itself down to prevent further damage.

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 fault. Voltage failure when malfunction causes interlock.

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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