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

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

Err.L Low

Atag Err.L Fault Code

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

Your boiler has recorded a previous fault in its memory, but this status message simply identifies that an error happened in the past rather than indicating a current, active failure.

Also written as ERRL — same fault.

The Atag Err.L fault code means: your boiler has recorded a previous fault in its memory, but this status message simply identifies that an error happened in the past rather than indicating a current, active failure.. It appears on 5 Atag models in our database.

Technical description: Last saved 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.L fault code

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

A200
E Range
E22c
Q 25S
Q 30CR

Source

Atag Err.L 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