What does the Ariston 3 02 fault code mean?

Your boiler's internal computer is unable to send signals between its main parts, causing the system to stop working reliably.

How much does it cost to fix Ariston error code 3 02?

Typical repair cost for the Ariston 3 02 fault is £150-300 including labour.

Communication error

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.