Medium
Reset Button Illuminated on Worcester Bosch Greenstar 12i System

Your boiler has detected a minor internal error and has safely paused operation until you manually restart it.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

The boiler has a fault condition and requires a reset.

From this model's manual
Verified against the Worcester Boiler Greenstar 12i System 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.

DIY fix possible

Locate the blue reset button on the front control panel.Press and hold the button for 3 to 5 seconds until the light stops flashing.Wait a few minutes to see if the boiler fires up and maintains operation.

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