BoilerFaultCodesYour boiler is unable to light the pilot flame, which means it cannot fire up to provide heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Is there 240V~ between pilot gas valve solenoid blue and brown connections? Isolate supply, test harness continuity. If satisfactory replace printed circuit board.
What causes this fault?
This fault occurs when the boiler's control system attempts to light the pilot flame but fails to receive the electrical signal or gas flow required to start the ignition process. The most common reason is an electrical failure in the main circuit board or a faulty solenoid preventing the gas valve from opening, meaning the boiler cannot safely begin the heating process.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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