Medium
1068 on Worcester Bosch Greenstar 2000 GR2300iW 25 C

Your boiler's internal sensor system is confused about the air quality or external temperature, which may hinder its efficiency or ability to run.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Outside temp. sensor or lambda probe faulty

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Wb 45175 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

All 129 fault codes on the Greenstar 2000 GR2300iW 25 C

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