While you wait for answers, we may have found some information which could help you.
Click here for Ariston Heating Hot WaterWhat is the problem?
error code e02 wont work when pressurised?
Ariston Microgenus 23 MFFI PCB Defect?
No display on Ariston e-combi approx3yrs old?
Why does my boiler remain ON - even when switch is moved to OFF?
I have an Ariston Clas He system with an error code of 1P2?