How much does it cost to fix Atag error code E01?

Typical repair cost for the Atag E01 fault is £120-250 including labour.

E01 High

Atag E01 Fault Code

Q: What does the Atag E01 fault code mean?

Your boiler has failed to ignite the flame needed to produce heat or hot water, usually because the gas supply is interrupted or the ignition system is blocked.

The Atag E01 fault code means: your boiler has failed to ignite the flame needed to produce heat or hot water, usually because the gas supply is interrupted or the ignition system is blocked.. It appears on 3 Atag models in our database.

Technical description: error code

Typical repair cost £120-250 (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 E01 fault code

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

A200 Repair: £100-£250
Premier Repair: £250-450
Q 25CR Repair: £120-250

Source

Atag E01 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