E.01.04 High

Baxi E.01.04 Fault Code

Also written as E0104 — same fault.

The Baxi E.01.04 fault code means: your boiler is repeatedly struggling to keep the flame lit while it is running, causing it to shut down for safety after multiple failures.. It appears on 8 Baxi models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Flame loss detected five times in 24 hours (burner on)
Typical repair cost £120-350 (including labour)

DIY fix possible

Check that your gas pre-payment meter has creditEnsure other gas appliances in your home, like a hob, are working correctlyReset the boiler by pressing the 'R' or 'Reset' button

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Baxi models that show the E.01.04 fault code

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

Source

Baxi E.01.04 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026