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

Typical repair cost for the Baxi E01 fault is £100-350 including labour.

E01 High

Baxi E01 Fault Code

Q: What does the Baxi E01 fault code mean?

Your boiler is failing to light the flame needed to heat your home, which is often caused by a temporary interruption in the gas supply or an issue with the ignition system.

The Baxi E01 fault code means: your boiler is failing to light the flame needed to heat your home, which is often caused by a temporary interruption in the gas supply or an issue with the ignition system.. It appears on 9 Baxi models in our database.

Technical description: Ignition failure or gas supply fault

Typical repair cost £100-350 (including labour)

DIY fix possible

Check that your gas emergency control valve is in the 'on' positionIf you have a prepayment meter, ensure you have credit and the meter is activePress the reset button or turn the control knob to 'R' for five seconds and release

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Baxi models that show the E01 fault code

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

Source

Baxi E01 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 27 April 2026