Low
1037 on Worcester Bosch Greenstar 2000

Your boiler has lost the connection to the weather sensor outside your home and is now running on a default setting to ensure you still have heating and hot water.

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 temp. sensor faulty - heating back-up operation active

From this model's manual
Verified against the Worcester Bosch Greenstar 27cdi installation & service manual, page 84.
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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