High
13 on Johnson Starley C10d

Your boiler has been manually reset too many times in a single hour and has locked itself as a safety precaution.

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

Remote reset lockout. Exceeded 5 remote resets per hour. Reset it by power off/on.

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 guides you might find useful