How much does it cost to fix Atag error code Error 19?

Typical repair cost for the Atag Error 19 fault is £120-250 including labour.

Error 19 High

Atag Error 19 Fault Code

Q: What does the Atag Error 19 fault code mean?

Your boiler has shut down because the water returning from your radiators is too hot, which suggests an issue with how the water is flowing or being measured inside the system.

Also written as ERROR19 — same fault.

The Atag Error 19 fault code means: your boiler has shut down because the water returning from your radiators is too hot, which suggests an issue with how the water is flowing or being measured inside the system.. It appears on 8 Atag models in our database.

Technical description: maximum return temperature exceeded

Typical repair cost £120-250 (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 19 fault code

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

Source

Atag Error 19 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