What does the Atag 304 fault code mean?

Your boiler has been manually reset too many times in a short period and has temporarily locked itself for safety.

How much does it cost to fix Atag error code 304?

Typical repair cost for the Atag 304 fault is £0-120 including labour.

Manufacturer manual

Too many resets

Shared across the iC Range range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

Turn off the power supply to the boiler at the fused spur switchWait for at least 30 secondsTurn the power back on to clear the software lockout

Boiler cover options

A cover plan would handle faults like 304: no call-out fees, no surprise bills.

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Seeing a different code? Every code this model can display, in one place.

Lockout fault with a reset-needed pattern.

Break-even maths on monthly cover.

7 signs repair isn't worth it anymore.