While you wait for answers, we may have found some information which could help you.
Click here for Combi Boiler Top Water Pressureerror code e02 wont work when pressurised?
Error light blinking (orange colour) on Ariston e-combi boiler?
Why does my boiler remain ON - even when switch is moved to OFF?
I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?
Ariston Microgenus 23 MFFI PCB Defect?
No display on Ariston e-combi approx3yrs old?