High
34 on Halstead Eden

Your boiler's computer is struggling to communicate with its internal settings, which is preventing it from safely starting the flame to heat your water or home.

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.

What the manual says

Manufacturer manual

CRC Error / No flame - Incorrect BCC (BCC’s only fitted to replacement PCB’s)

From this model's manual
Verified against the Halstead Eden installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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