We may have found other answers which could help you.
Click here for Ariston Gas BoilerAriston Microgenus 23 MFFI PCB Defect?
No display on Ariston e-combi approx3yrs old?
boiler keeps going out?
gas boiler keeps going to reset?
Why does my boiler remain ON - even when switch is moved to OFF?
error code e02 wont work when pressurised?