Your boiler is currently performing a brief automatic self-test to clear any trapped air from the system and will usually resume normal operation on its own after two minutes.

DIY fix possible

Wait for 120 seconds to allow the automated air purge cycle to complete.Do not turn off or reset the boiler while this light is displayed.If the code does not disappear after two minutes, check that your system pressure is at the correct level (typically 1-1.5 bar) and top it up if necessary.