Block 60 Medium

Atag Block 60 Fault Code

Also written as BLOCK60 — same fault.

The Atag Block 60 fault code means: your boiler’s internal computer settings have been incorrectly adjusted, which is preventing it from knowing how much power it should use to operate safely.. It appears on 8 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: Incorrect parameter setting of the minimum or maximum power.
Typical repair cost £120-200 (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 60 fault code

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

Source

Atag Block 60 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