While you wait for answers, we may have found some information which could help you.
Click here for Heating Boiler Temperature
Ariston Microgenus 23 MFFI PCB Defect?
What is the problem?
Why does my boiler remain ON - even when switch is moved to OFF?
Error light blinking (orange colour) on Ariston e-combi boiler?
ariston boiler slow to ignite?
I have an Ariston Clas He system with an error code of 1P2?