How much does it cost to fix boiler error code CC 800?

Typical repair cost for the boiler CC 800 fault is £90-160 including labour.

CC 800 Low

Boiler Fault Code CC 800

Also written as CC800 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code CC 800 appears across 1 boiler brand and 11 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble communicating with the temperature sensor located on the outside of your house, which helps it run more efficiently based on the weather. (As reported on Worcester Bosch 35 RSF)

Pick your boiler brand for the CC 800 fix

Worcester Bosch CC 800 11 models

Source

Information for the CC 800 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 27 April 2026