What does the Grant Lock-out fault code mean?

Your boiler has stopped working to protect itself and needs to be restarted, though it may take a few attempts to get it running again.

How much does it cost to fix Grant error code Lock-out?

Typical repair cost for the Grant Lock-out fault is £120-250 including labour.

Check your external oil supply tank to ensure you have enough fuel and that any isolation valves are open.

The boiler has failed to fire or has experienced a safety shut-off. Refer to Section 7 for reset instructions.

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

Each noise points to a different fault.

Lockout fault with a reset-needed pattern.

Safety-critical — turn off, read this.