We may have found other answers which could help you.
Click here for Boiler Pressure System
ariston boiler slow to ignite?
Ariston Microgenus 23 MFFI PCB Defect?
Why does my boiler remain ON - even when switch is moved to OFF?
No display on Ariston e-combi approx3yrs old?
gas boiler keeps going to reset?
Error light blinking (orange colour) on Ariston e-combi boiler?