Your boiler has encountered a temporary communication or sensor error and may be trying to restart 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 occurs when the boiler's internal computer loses consistent communication with its temperature sensors or other electronic components. It is often caused by a loose wire or a sensor that is beginning to fail, leading to inconsistent electrical signals. Because the boiler cannot accurately monitor its internal state, it pauses operation as a safety precaution while it attempts to reconnect.
DIY fix possible
Wait for a few minutes to see if the boiler resets itself automaticallyTurn the selector switch to the 'OFF/RESET' position and then back to 'ON'Check if the boiler pressure gauge is between 1 and 1.5 bar
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