How much does it cost to fix Halstead error code Safety system failure?

Typical repair cost for the Halstead Safety system failure fault is £250-450 including labour.

Safety system failure High

Halstead Safety system failure Fault Code

Q: What does the Halstead Safety system failure fault code mean?

Your boiler's internal computer has encountered a critical error during its automatic safety checks and cannot safely operate, requiring a professional to investigate.

Also written as SAFETYSYSTEMFAILURE — same fault.

The Halstead Safety system failure fault code means: your boiler's internal computer has encountered a critical error during its automatic safety checks and cannot safely operate, requiring a professional to investigate.. It appears on 4 Halstead models in our database.

Technical description: Failure of internal self checking system • Check PCB

Typical repair cost £250-450 (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 Safety system failure fault code

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

Source

Halstead Safety system failure 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