How much does it cost to fix Atag error code E00?

Typical repair cost for the Atag E00 fault is £300-600 including labour.

E00 High

Atag E00 Fault Code

Q: What does the Atag E00 fault code mean?

Your boiler's internal computer has encountered a critical error and can no longer safely manage its operations, meaning the system will have shut down to prevent further damage.

The Atag E00 fault code means: your boiler's internal computer has encountered a critical error and can no longer safely manage its operations, meaning the system will have shut down to prevent further damage.. It appears on 1 Atag model in our database.

Technical description: Faulty control unit

Typical repair cost £300-600 (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 E00 fault code

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

Premier Repair: £300-600

Source

Atag E00 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