E30 Low

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.

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: External sensor fault (if fitted)
Typical repair cost £100-200 (including labour)

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 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