While you wait for answers, we may have found some information which could help you.
Click here for Check Pressure Hot
Ariston Microgenus 23 MFFI PCB Defect?
boiler keeps going out?
I have error code 108 on my Ariston Combi boiler what do I do to fix it?
I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?
ariston boiler slow to ignite?
Why does my boiler remain ON - even when switch is moved to OFF?