While you wait for answers, we may have found some information which could help you.
Click here for Problem Dhw HeatingNo display on Ariston e-combi approx3yrs old?
I have an Ariston Clas He system with an error code of 1P2?
Ariston Microgenus 23 MFFI PCB Defect?
ariston boiler slow to ignite?
boiler keeps going out?
Why does my boiler remain ON - even when switch is moved to OFF?