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
Observe the boiler to see if the code clears automaticallyPress the reset button if the fault becomes permanentMonitor the boiler for frequent recurrences of this codeContact a qualified engineer if the fault persists after a reset