Your boiler has shut down completely because it reached the maximum number of failed attempts to fix an underlying problem.
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 internal computer has tried multiple times to resolve a previous error but has failed to do so safely. It acts as a safety shutdown to prevent damage, usually triggered by a persistent issue with the ignition process or the fuel delivery system. Because the boiler cannot confirm it is firing correctly after several attempts, it enters a hard lock to protect the household.
DIY fix possible
Turn the mode selector switch to 'OFF/RESET' for 5 secondsTurn the dial back to the 'Hot Water' or 'Heating' positionMonitor the display to see if a different fault code (like 01 or 03) appears immediately after resetting
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like 07 — 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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