How much does it cost to fix Atag error code E28?

Typical repair cost for the Atag E28 fault is £180-350 including labour.

E28 High

Atag E28 Fault Code

Q: What does the Atag E28 fault code mean?

Your boiler has stopped working because it cannot properly clear exhaust gases, which is a key safety feature to prevent fumes from building up.

The Atag E28 fault code means: your boiler has stopped working because it cannot properly clear exhaust gases, which is a key safety feature to prevent fumes from building up.. It appears on 1 Atag model in our database.

Technical description: Fan fault

Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Atag models that show the E28 fault code

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

Premier Repair: £180-350

Source

Atag E28 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