What does the Grant Lock-out fault code mean?

Your boiler has stopped because it failed to ignite, so you need to perform a simple reset to try and wake it up 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.

Can I fix Grant fault code Lock-out myself?

Ensure your heating oil tank has sufficient fuel

Grant Lock-out Fault Code: What It Means & How to Fix It

Technical description

The 'Lock-out' reset button lights if the burner does not light. Wait for about 45 seconds then press the reset button to restart the ignition process.

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 →

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Your boiler has stopped because it failed to ignite, so you need to perform a simple reset to try and wake it up again.

Technical description

Engineer required

Related guides you might find useful

Boiler keeps cutting out

Yellow or orange flame — CO safety

When to replace your boiler

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