While you wait for answers, we may have found some information which could help you.
Click here for Combi Boiler Heating Red Light
Ariston Microgenus 23 MFFI PCB Defect?
No display on Ariston e-combi approx3yrs old?
gas boiler keeps going to reset?
Why does my boiler remain ON - even when switch is moved to OFF?
Error light blinking (orange colour) on Ariston e-combi boiler?
error code e02 wont work when pressurised?