High
2980 on Worcester Bosch Greenstar 2000

Your boiler has locked itself as a safety precaution, which means it has stopped providing heating or hot water until it is manually reset.

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

Locking fault: To unlock Hold up and down arrow keys pressed simultaneously for 3 s.

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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