Ariston combi won't ignite?

I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?

I have an Ariston Clas He system with an error code of 1P2?

Why does my boiler remain ON - even when switch is moved to OFF?

error code e02 wont work when pressurised?

gas boiler keeps going to reset?

No display on Ariston e-combi approx3yrs old?

I have error code 108 on my Ariston Combi boiler what do I do to fix it?

Ariston Microgenus 23 MFFI PCB Defect?

Error light blinking (orange colour) on Ariston e-combi boiler?

ariston boiler slow to ignite?

boiler keeps going out?

What is the problem?