Ariston Boilers Guide

My Ariston Eurocombi boiler is displaying an error code A01 intermittently. I have restarted it but boiler stayed in the lockout mode. What could be a possible reason behind it because apparently everything seems good? Please share your views.

Regards

Louis

Hi Louis,

According to the user guide, an error code A01 means Boiler Lockout. Generally, there are two reasons behind it:

• Leakage in the boiler’s heating system
• Faulty pressure sensor

In case there is, a leakage in the boiler’s heating system, check the pressure device on the boiler. The recommended pressure is 1.5. When boiler’s pressure is too low, it will go into lockout mode. Simply, top up the boiler’s pressure by using the filling loop in you feel that pressure is too low. Conversely, if a pressure sensor is faulty it is better to replace it. I hope that it will make your boiler to work again.