What does the Halstead LOCK OUT fault code mean?

Your boiler has stopped working for safety reasons and needs a manual reset to attempt to start up again.

How much does it cost to fix Halstead error code LOCK OUT?

Typical repair cost for the Halstead LOCK OUT fault is £100-250 including labour.

Turn your boiler thermostat dial fully anti-clockwise to the reset position and hold it there for a few seconds.

Manufacturer manual

Boiler failure to light or safety shut down; requires reset by turning the boiler thermostat fully anti-clockwise.

Shared across the Hero range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like LOCK OUT: no call-out fees, no surprise bills.

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Seeing a different code? Every code this model can display, in one place.