How much does it cost to fix Atag error code Error 28?

Typical repair cost for the Atag Error 28 fault is £180-350 including labour.

Error 28 High

Atag Error 28 Fault Code

Q: What does the Atag Error 28 fault code mean?

Your boiler has detected that the internal fan responsible for clearing exhaust gases is not spinning correctly, and it has safely shut itself down to prevent unsafe operation.

Also written as ERROR28 — same fault.

The Atag Error 28 fault code means: your boiler has detected that the internal fan responsible for clearing exhaust gases is not spinning correctly, and it has safely shut itself down to prevent unsafe operation.. It appears on 8 Atag models in our database.

Technical description: number of revolutions not reported back from fan

Typical repair cost £180-350 (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 Error 28 fault code

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

Source

Atag Error 28 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