High
Water level control: lock out on Remeha Quinta 30

Your boiler has stopped working because it cannot detect the water level inside the unit, likely due to a loose wire or a faulty sensor connection.

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

The boiler goes to lock out if the electrode is disconnected or if there is a shortcut between the electrode and earth. Requires reset by pressing the reset button on the instrument panel.

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.

Find a Gas Safe engineer
Search the official register →

Related fault codes

E02View →E04View →

Related guides you might find useful

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →