How much does it cost to fix Baxi error code E92?

Typical repair cost for the Baxi E92 fault is £120-350 including labour.

E92 High

Baxi E92 Fault Code

Q: What does the Baxi E92 fault code mean?

Your boiler has failed to calibrate its internal settings correctly during a self-check of the gas and air mixture.

The Baxi E92 fault code means: your boiler has failed to calibrate its internal settings correctly during a self-check of the gas and air mixture.. It appears on 23 Baxi models in our database.

Technical description: Combustion test alarm during auto-setting

What causes the Baxi E92 fault?

This fault occurs when the boiler's internal computer tries to automatically balance the ratio of gas and air but fails to reach a safe or efficient level. The most common reason is that the sensing electrode is worn out or the gas valve is unable to adjust precisely enough to complete the self-test. It can also be caused by an unstable gas supply or a blockage in the flue affecting the air intake.

Typical repair cost £120-350 (including labour)

Engineer required

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

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Baxi models that show the E92 fault code

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

Source

Baxi E92 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