High
39 on Halstead Dimplex Combi

Your boiler's main control board has lost connection with its security chip or has been configured incorrectly following a repair.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

BCC Error / No flame - BCC installation failed (BCC’s only fitted to replacement PCB’s)

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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