61 High

Atag 61 Fault Code

The Atag 61 fault code means: your boiler's electronic control system has lost its internal connection, meaning the main brain can no longer talk to the other components to request heating or hot water.. It appears on 4 Atag models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Bus communication error (contact open)
Typical repair cost £150-350 (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 61 fault code

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

Source

Atag 61 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