23.45 kW Low

Baxi 23.45 kW Fault Code

Also written as 2345KW — same fault.

The Baxi 23.45 kW fault code means: your boiler is operating correctly and this is simply an informational message indicating your unit's current heating power setting.. It appears on 1 Baxi model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: The maximum output of the boiler is factory set at 23.45kW (80,000 Btu/hr). This can be altered to 29.30kW (100,000 Btu/hr)

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 23.45 kW fault code

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

Source

Baxi 23.45 kW 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