How much does it cost to fix Atag error code Block 67?

Typical repair cost for the Atag Block 67 fault is £120-250 including labour.

Block 67 Medium

Atag Block 67 Fault Code

Q: What does the Atag Block 67 fault code mean?

Your boiler has detected an unusual temperature difference while it is supposed to be switched off, and it is pausing its operations until the system temperatures balance out.

Also written as BLOCK67 — same fault.

The Atag Block 67 fault code means: your boiler has detected an unusual temperature difference while it is supposed to be switched off, and it is pausing its operations until the system temperatures balance out.. It appears on 8 Atag models in our database.

Technical description: A (Δ)T has been detected between flow and return sensor whereas the burner is not in operation. After the (Δ)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 Block 67 fault code

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

Source

Atag Block 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 27 April 2026