Low
CC on Worcester Bosch Greenstar 30

Your boiler temporarily cannot detect the outdoor temperature sensor, which usually just means your heating will default to a standard indoor schedule rather than adjusting automatically to the weather outside.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Outside temperature sensor not detected.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 24 Rsf 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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

C1View →C7View →

All 18 fault codes on the Greenstar 30

Seeing a different code? Every code this model can display, in one place.

A7A8Adb1b2b3C6d3d5E2E9EAF0F1F7FAFd

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