C Low

Halstead C Fault Code

The Halstead C fault code means: your boiler is working exactly as it should and has successfully lit the burner for heating or hot water.. It appears on 1 Halstead 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: Boiler has lit / normal operation
Typical repair cost £0 (including labour)

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Halstead models that show the C fault code

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

Source

Halstead C 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 7 July 2026