While you wait for answers, we may have found some information which could help you.
Click here for Ariston 23 Mffierror code e02 wont work when pressurised?
I have an Ariston Clas He system with an error code of 1P2?
Error light blinking (orange colour) on Ariston e-combi boiler?
Why does my boiler remain ON - even when switch is moved to OFF?
ariston boiler slow to ignite?
gas boiler keeps going to reset?