Follow This Guide to Reset Your Worcester Bosch Greenstar Boiler

If your Worcester Bosch Greenstar boiler has suddenly stopped working or is showing a flashing blue light, a simple reset might be all it needs to get back up and running. This guide will take you through the reset process step-by-step, helping you restore heat and hot water quickly and safely.

Common Reasons Your Worcester Bosch Greenstar Boiler May Need a Reset

Understanding why your boiler requires resetting can help you prevent recurring problems. Common causes include:

While a straightforward reset often solves the problem, persistent errors may point to more serious issues such as a faulty sensor, diverter valve, or heat exchanger. Always check the display panel for warning codes or flashing lights as these provide clues about the fault. If your boiler regularly needs resetting, it’s time to call in a professional.

Regular servicing and preventative maintenance can catch small faults before they turn into expensive repairs. Don’t ignore repeated faults—contact a qualified engineer to keep your heating system running safely and efficiently.

Worcester Greenstar CDi Classic Boiler Reset

To bleed your radiators, you will need the following tools:

If the reset is successful, the boiler will return to normal operation. If it’s not, the alert code will reappear and the blue operation/fault light will continue to flash.

Worcester Greenstar Si & CDi Compact Boiler Reset

If the reset is successful, the boiler will return to normal operation.
If the reset is unsuccessful, the alert code will show again, and the blue operation/fault light will keep flashing.

Worcester Greenstar i Boiler Reset

If the reset was successful the appliance will return to normal operation.
If the reset was not successful then the alert code will be displayed again, and the blue operation/fault light will continue to flash.

Worcester Greenstar i Junior Boiler Reset

If there’s a fault, the reset button will flash once every second, and the blue mains indicator light will also flash.

Worcester Greenstar Ri Boiler Reset

If there is a fault, the blue mains indicator light will flash.

Still not working?

Sometimes, unfortunately, simply resetting your boiler isn’t enough to get it working again. If your boiler keeps going back into fault mode, it’s time to call a Gas Safe registered engineer to diagnose and fix the issue safely.

At Heatwise Heating, our Gas Safe engineers are ready to come to your rescue—quickly diagnosing and efficiently repairing your boiler. Get in touch