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

Typical repair cost for the Atag COdE fault is £80-120 including labour.

COdE Low

Atag COdE Fault Code

Q: What does the Atag COdE fault code mean?

Your boiler is asking for a secure service password, which usually appears during routine maintenance or setup and indicates it is currently locked from standard operation.

Also written as CODE — same fault.

The Atag COdE fault code means: your boiler is asking for a secure service password, which usually appears during routine maintenance or setup and indicates it is currently locked from standard operation.. It appears on 4 Atag models in our database.

Technical description: Prompt to enter the installer access code.

Typical repair cost £80-120 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Atag models that show the COdE fault code

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

Source

Atag COdE 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