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

Typical repair cost for the Atag 19 fault is £100-250 including labour.

19 High

Atag 19 Fault Code

Q: What does the Atag 19 fault code mean?

Your boiler has shut down because the water returning from your radiators is too hot, which usually means heat isn't being released into your rooms properly.

The Atag 19 fault code means: your boiler has shut down because the water returning from your radiators is too hot, which usually means heat isn't being released into your rooms properly.. It appears on 1 Atag model in our database.

Technical description: Return temperature too high

Typical repair cost £100-250 (including labour)

DIY fix possible

Check that at least two or three radiators have their valves fully openEnsure all Thermostatic Radiator Valves (TRVs) are turned up to a high settingCheck that the internal pump is running if it is audible

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Atag models that show the 19 fault code

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

E Range Repair: £100-250

Source

Atag 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