How much does it cost to fix boiler error code C52?

Typical repair cost for the boiler C52 fault is £120-250 including labour.

C52 Emergency

Boiler Fault Code C52

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code C52 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 has detected an issue with the way it is venting exhaust gases, meaning it cannot operate safely. (As reported on Ravenheat CSI 85)

Pick your boiler brand for the C52 fix

Ravenheat C52 1 model

Source

Information for the C52 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