67 Medium

Atag 67 Fault Code

The Atag 67 fault code means: your boiler has detected an unusual temperature difference between its internal pipes while it is turned off, which may indicate a sensor error or a flow problem.. It appears on 4 Atag models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: A (cid:39)T has been detected between flow and return sensor whereas the burner is not in operation. After the (cid:39)T has disappeared the block will disappear.
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 67 fault code

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

Source

Atag 67 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