How much does it cost to fix Atag error code 140?

Typical repair cost for the Atag 140 fault is £180-350 including labour.

140 High

Atag 140 Fault Code

Q: What does the Atag 140 fault code mean?

Your boiler has stopped working because it cannot detect the water pump moving or the correct water pressure needed to operate safely.

The Atag 140 fault code means: your boiler has stopped working because it cannot detect the water pump moving or the correct water pressure needed to operate safely.. It appears on 13 Atag models in our database.

Technical description: Dynamic Pressure Check Failed (or no pump detection)

Typical repair cost £180-350 (including labour)

DIY fix possible

Check that your boiler pressure gauge is between 1 and 1.5 barIf pressure is low, top up the system using the filling loopRestart the boiler by pressing the Reset button

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Atag models that show the 140 fault code

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

Source

Atag 140 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 31 August 2026