Your boiler has failed to fire up or complete its safety checks after several attempts and has now locked itself out 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: Final fault code (Refer to section 7.11)
What causes this fault?
This fault occurs when the boiler's control system fails to detect a flame after multiple ignition attempts, causing the unit to shut down for safety. The most common reasons are a lack of gas supply to the burner, a build-up of soot on the ignition sensors, or a failure in the electrical signals sent by the main control board.
DIY fix possible
Locate the mode selector switch on the front panel.Turn the switch to the 'OFF/RESET' position and wait for 10 seconds.Turn the switch back to either 'Hot Water Only' or 'Heating and Hot Water' to see if the boiler restarts.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 09 — no call-out fees, no surprises.
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Vokera Linea HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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