How much does it cost to fix Atag error code Err.2?

Cost varies. Contact a Gas Safe registered engineer for a quote.

Err.2 Low

Atag Err.2 Fault Code

Q: What does the Atag Err.2 fault code mean?

Your boiler is displaying a stored memory of an old problem that occurred two errors ago, rather than a current issue preventing it from working.

Also written as ERR2 — same fault.

The Atag Err.2 fault code means: your boiler is displaying a stored memory of an old problem that occurred two errors ago, rather than a current issue preventing it from working.. It appears on 2 Atag models in our database.

Technical description: 2nd last predecessing error

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 Err.2 fault code

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

E22c Repair: £150-300
Q 25S

Source

Atag Err.2 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