How much does it cost to fix Atag error code Error 00?

Typical repair cost for the Atag Error 00 fault is £150-300 including labour.

Error 00 High

Atag Error 00 Fault Code

Q: What does the Atag Error 00 fault code mean?

Your boiler is struggling to light correctly or stay lit, which means it will not be able to provide heating or hot water until the issue is resolved.

Also written as ERROR00 — same fault.

The Atag Error 00 fault code means: your boiler is struggling to light correctly or stay lit, which means it will not be able to provide heating or hot water until the issue is resolved.. It appears on 8 Atag models in our database.

Technical description: Poor flame-forming

Typical repair cost £150-300 (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 Error 00 fault code

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

Source

Atag Error 00 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