What does the Glow-worm Neon 4 lit (No) fault code mean?

Your boiler is failing to light the gas flame or cannot detect that the flame has started, so it has shut down for safety.

How much does it cost to fix Glow-worm error code Neon 4 lit (No)?

Typical repair cost for the Glow-worm Neon 4 lit (No) fault is £120-280 including labour.

Can I fix Glow-worm fault code Neon 4 lit (No) myself?

Check if other gas appliances, like a cooker hob, are working to ensure gas is reaching the property.

Glow-worm Neon 4 lit (No) Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Ignition, pilot or flame proving fault

From this model's manual

Verified against the Ultimate 30ff installation & service manual.

What causes this fault?

This fault occurs when the boiler tries to start but fails to either generate a spark or open the gas flow to create a flame. The most common reasons are a worn-out ignition electrode that can no longer create a spark or a faulty gas valve that isn't letting fuel into the burner.

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 is failing to light the gas flame or cannot detect that the flame has started, so it has shut down for safety.

What the manual says

What causes this fault?

Engineer required

Avoid the next call-out bill

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