While you wait for answers, we may have found some information which could help you.
Click here for Boiler Error Code Air Pressure Switcherror code e02 wont work when pressurised?
Why does my boiler remain ON - even when switch is moved to OFF?
boiler keeps going out?
Error light blinking (orange colour) on Ariston e-combi boiler?
ariston boiler slow to ignite?
I have an Ariston Clas He system with an error code of 1P2?