Ariston Boilers Guide

Hi,

I have an Ariston boiler model 24HE, it shows code E34. Boiler is in lockout mode. I tried restarting, several times actually- no success. What is wrong? Pump? Valve? Pressure looks fine to me, it is 1.2 bar. Anyone an idea?

Rob

Hi Rob

Code E34 means Air Switch Pressure fault. It is quite common fault on Ariston boilers, you can either  remove the flue restrictor that will allow you to see all devices coming to air switch pressure and check if non of the ways is blocked or replace an air switch pressure itself. If your appliance is still under warranty simple call Ariston customer service and request a fast fix.