While you wait for answers, we may have found some information which could help you.
Click here for Combi Fine Hot Watererror code e02 wont work when pressurised?
Ariston Microgenus 23 MFFI PCB Defect?
boiler keeps going out?
I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?
What is the problem?
gas boiler keeps going to reset?