BoilerFaultCodesYour boiler is struggling to ignite or detect a flame correctly during its starting sequence and has paused for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Error during start-up procedure (requires 3 minute venting cycle after resolution)
What causes this fault?
This fault occurs when the boiler fails to establish or maintain a stable flame during the ignition sequence. The most common reasons include a worn-out ignition electrode that can no longer produce a spark, or a faulty sensor that fails to tell the boiler that the gas has successfully lit.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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