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

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

CC 800 Low

Worcester Bosch CC 800 Fault Code

Q: What does the Worcester Bosch CC 800 fault code mean?

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.

Also written as CC800 — same fault.

The Worcester Bosch CC 800 fault code means: 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.. It appears on 11 Worcester Bosch models in our database.

Technical description: Outdoor sensor defect available when accessory outdoor sensor is connected

Typical repair cost £90-160 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Worcester Bosch models that show the CC 800 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch CC 800 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026