High
2914 on Worcester Bosch Greenstar 27CDi

Your boiler's internal computer is failing to talk to the part that creates heat, meaning it cannot start up.

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

There is no communication between the appliance controller and burner module

From this model's manual
Verified against the Worcester Bosch Greenstar 27cdi installation & service manual, page 85.
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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