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