While you wait for answers, we may have found some information which could help you.
Click here for Central Boiler 28Why does my boiler remain ON - even when switch is moved to OFF?
Ariston Microgenus 23 MFFI PCB Defect?
gas boiler keeps going to reset?
What is the problem?
error code e02 wont work when pressurised?
I have an Ariston Clas He system with an error code of 1P2?