What does the Atag Error 04 fault code mean?

Your boiler has lost its electrical connection or is struggling to process the power supply, causing it to shut down for protection.

How much does it cost to fix Atag error code Error 04?

Typical repair cost for the Atag Error 04 fault is £120-250 including labour.

adjustment or error for voltage interruption

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

Work through these before the call-out.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.