2.4 High

Baxi 2.4 Fault Code

Also written as 24 — same fault.

The Baxi 2.4 fault code means: your boiler has detected an issue with the water pressure or the safety mechanism that ensures water is flowing correctly, causing it to stop operating to prevent internal damage.. It appears on 1 Baxi model 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: Hydraulic & Safety Operatives
Typical repair cost £150-300 (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 2.4 fault code

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

Source

Baxi 2.4 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