High
3071 on Worcester Bosch Greenstar 2000

Your boiler is having trouble communicating with its wireless thermostat, which is preventing it from knowing when to turn the heating on.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Comfort + II RF | Check the configuration (address setting). The selected setting requires a remote control. Check the EMS connection cable for the remote control for damage. The BUS voltage on the remote control must be between 12 and 15V DC. The remote control is defective.

From this model's manual
Verified against the Worcester Bosch Greenstar 27cdi installation & service manual, page 88.
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 is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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