How to mend Ariston Euro A27

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

ariston boiler?

What is the problem?

Ariston microgenus 23 sounds like a jumbo jet!?

E 34 on ariston boiler microgenus 24?

ariston genus he shows error A06?

Replace PCb on 30he?

Heating? Ariston micro genus 27 mffi?

eurocombi?

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

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

Arriston combi boiler hot water scalding temp light comes on?

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

Ariston Microgenus 23 MFFI PCB Defect?

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

ariston microgenus 23 chimney led on?

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

error code e02 wont work when pressurised?

Ariston Error Code E02 now A77?

Boiler fault Ariston Dia 20 mffi ce type c?

boiler keeps going out?

Ariston microgenus 27 mffi problem?

ariston e combi evo?

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

No display on Ariston e-combi approx3yrs old?

boiler stopped working?

how to fix a err 103?

gas boiler keeps going to reset?

ariston boiler slow to ignite?

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