BoilerFaultCodesTechnical description
Outside temperature is adopted by the LON BUS
What causes this fault?
This occurs because your boiler has detected that it is receiving outdoor temperature data from another device on your home network rather than from its own dedicated sensor. It typically happens when the boiler is linked to a wider building management system or a smart home network that takes over the job of telling the boiler how cold it is outside. This isn't a mechanical breakdown, but rather a change in how the boiler's computer is communicating with other parts of your home.
DIY fix possible
Locate the fault code on the displayPress the 'OK' or 'Reset' button to acknowledge the notificationMonitor the display to see if the message reappears or if heating performance changes
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