How much does it cost to fix Atag error code 24?

Typical repair cost for the Atag 24 fault is £250-550 including labour.

24 High

Atag 24 Fault Code

Q: What does the Atag 24 fault code mean?

Your boiler's internal computer brain has detected a software or communication error and has stopped working to protect itself.

The Atag 24 fault code means: your boiler's internal computer brain has detected a software or communication error and has stopped working to protect itself.. It appears on 1 Atag model in our database.

Technical description: Internal error

Typical repair cost £250-550 (including labour)

DIY fix possible

Switch the boiler off at the fused spur or power switch.Wait for 30 seconds.Switch the power back on and press the 'Reset' button.

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Atag models that show the 24 fault code

Click a model for the full fault code list and model-specific repair notes.

E Range Repair: £250-550

Source

Atag 24 fault code information on this page is sourced and cross-checked against the official Atag service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026