While you wait for answers, we may have found some information which could help you.
Click here for Pressure Gauge TopI have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?
I have an Ariston Clas He system with an error code of 1P2?
ariston boiler slow to ignite?
Why does my boiler remain ON - even when switch is moved to OFF?
What is the problem?
gas boiler keeps going to reset?