BoilerFaultCodes CRC error High
Boiler Fault Code CRC error
Also written as CRCERROR — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code CRC error appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's computer memory has become corrupted, meaning the system can no longer read its own instructions to operate safely. (As reported on Halstead Finest Gold)
Pick your boiler brand for the CRC error fix
Source
Information for the CRC error fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026