BoilerFaultCodesYour boiler is repeatedly failing to start and has locked itself out for safety after five unsuccessful attempts in a short period.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Restart occurs 5 times within 15 minutes.
What causes this fault?
This fault occurs when the boiler senses a repeated failure to maintain a stable flame, causing it to shut down for safety after five unsuccessful ignition attempts. It is usually caused by a component failing to detect the flame correctly or an inconsistent supply of gas reaching the burner. Because the system cannot verify it is burning fuel safely, it stops operating to prevent unburnt gas from building up.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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