While you wait for answers, we may have found some information which could help you.
Click here for Ariston Water Boilererror code e02 wont work when pressurised?
Ariston Microgenus 23 MFFI PCB Defect?
Error light blinking (orange colour) on Ariston e-combi boiler?
ariston boiler slow to ignite?
gas boiler keeps going to reset?
No display on Ariston e-combi approx3yrs old?