BoilerFaultCodesHalstead 24 Fault Code
The Halstead 24 fault code means: your boiler has detected that the internal air extraction system isn't reporting back correctly, so it has safely shut itself down to prevent operation without proper ventilation.. It appears on 5 Halstead models in our database.
Technical description: Faulty fan signal, no flame and fan runs continuously - Missing or defective signal from fan
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Halstead models that show the 24 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Halstead 24 fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.
- Halstead Dimplex Combi manual (PDF)
- Halstead Dimplex System manual (PDF)
- Halstead Eden CBX/SBX manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026