Your boiler has detected a temporary internal communication issue or a potential sensor error and is trying to reset itself.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Temporary fault code (Refer to section 7.10)
What causes this fault?
This fault happens when the boiler's internal computer momentarily loses contact with one of its temperature sensors or components. It is often caused by a loose electrical connection or a sensor that is starting to fail and giving an inconsistent reading.
DIY fix possible
Turn the control knob to the 'OFF/RESET' position.Wait for approximately 30 seconds.Turn the knob back to your desired 'Heating' or 'Hot Water' setting.
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