While you wait for answers, we may have found some information which could help you.
Click here for Increase Pressure BoilerI have an Ariston Clas He system with an error code of 1P2?
I have error code 108 on my Ariston Combi boiler what do I do to fix it?
error code e02 wont work when pressurised?
Error light blinking (orange colour) on Ariston e-combi boiler?
gas boiler keeps going to reset?
Ariston Microgenus 23 MFFI PCB Defect?