How to mend ... Ariston Combi Water

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

What is the problem?

Why is the pressure on my Ariston boiler rising to nearly 4 Bar?

E 34 on ariston boiler microgenus 24?

boiler stopped working?

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

Ariston microgenus 23 sounds like a jumbo jet!?

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

eurocombi?

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

Ariston Error Code E02 now A77?

how to fix a err 103?

Ariston Microgenus 23 MFFI PCB Defect?

Heating? Ariston micro genus 27 mffi?

Please could anyone tel me why my boiler constantly shows err 501. I reset?

Ariston microgenus 27 mffi problem?

gas boiler keeps going to reset?

Why is my ariston microgenus 23 combi boiler producing hot water downstairs?

ariston e combi evo?

No display on Ariston e-combi approx3yrs old?

ariston boiler slow to ignite?

error code e02 wont work when pressurised?

boiler keeps going out?

ariston boiler?

ariston microgenus 23 chimney led on?

Replace PCb on 30he?

Ariston micro Genus boiler HE 28 MFFI?

ariston genus he shows error A06?

Boiler fault Ariston Dia 20 mffi ce type c?

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