CRC error High

Halstead CRC error Fault Code

Also written as CRCERROR — same fault.

The Halstead CRC error fault code means: your boiler's computer has encountered a memory corruption error, meaning it has forgotten how to run the heating system properly.. It appears on 4 Halstead models 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: Internal Eprom data error • Check PCB
Typical repair cost £250-400 (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 CRC error fault code

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

Source

Halstead CRC error 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