While you wait for answers, we may have found some information which could help you.
Click here for Microgenus 23 MffiWhy does my boiler remain ON - even when switch is moved to OFF?
ariston boiler slow to ignite?
What is the problem?
boiler keeps going out?
error code e02 wont work when pressurised?
I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?