Halstead E30 Fault Code
The Halstead E30 fault code means: your boiler is struggling to read the outside temperature because the external weather sensor is disconnected or broken.. It appears on 6 Halstead models in our database.
Technical description: External sensor fault (if fitted)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Halstead models that show the E30 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Halstead E30 fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026