BoilerFaultCodesYour boiler is failing to light properly because the internal pilot flame is being lost or is too weak to stay on.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: failing or unstable flame of pilot burner
What causes this fault?
This fault occurs when the boiler's control system cannot detect a steady flame at the pilot burner during the ignition sequence. The most common reasons are a worn-out sensor that can no longer 'see' the flame or a buildup of carbon and debris on the burner that prevents a clean, stable light-off.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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