Your boiler has detected an internal communication glitch or a temporary sensor error that it is currently trying to rectify automatically.
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 occurs when the boiler's internal computer struggles to communicate with its sensors or other electronic components. It is often caused by a brief interference in the electrical signals or a loose connection within the internal wiring that links the parts together. In some cases, it can indicate that the main control board is beginning to fail and is struggle to process information correctly.
DIY fix possible
Turn the mode selector switch to the 'OFF/RESET' position.Wait approximately 30 seconds.Turn the selector switch back to your desired setting (Heating or Hot Water).
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