Worcester Bosch Greenstar boiler experts

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Need to reset your Worcester Bosch Greenstar boiler?

Follow this easy guide to reset your Worcester Bosch Greenstar boiler.

If your Worcester Bosch Greenstar boiler suddenly stops working or shows a flashing blue light, a quick reset might be all it needs to get things back on track. This guide will take you step-by-step through resetting your boiler so you can enjoy warm heat and hot water again—fast and easy!

Why Your Worcester Bosch Greenstar Boiler Might Need a Reset

Knowing why your boiler needs a reset can help prevent the same issues from happening again. Common reasons include low water pressure, frozen condensate pipes in cold weather, blocked air vents, or thermostat problems. Power outages and gas supply interruptions can also cause the boiler to go into fault mode.

A quick reset of your Worcester Bosch Greenstar boiler often does the trick, but if errors keep popping up, it might mean there’s a bigger problem inside—like a faulty sensor, diverter valve, or heat exchanger. Keep an eye out for warning codes or flashing lights on the display panel, as these give helpful hints about what’s wrong. If you find yourself resetting your boiler often, it’s a good idea to call in a professional. Regular maintenance and annual servicing can spot small issues early and save you from expensive repairs down the line.

Don’t overlook repeated faults—reach out to a qualified engineer to make sure your home heating system is working safely and efficiently.

Worcester Greenstar CDi Classic Boiler Reset

Here’s what you’ll need to bleed your radiators:

  • Hold down the reset button [2] for about three seconds.
  • You’ll notice the reset button [2] and the fault indicator [3] will stop flashing once it’s done.

    • If the reset worked, your boiler will get back to normal and start running like usual.
    If it didn’t work, the alert code will pop up again, and the blue operation/fault light will keep flashing.

    Greenstar cdi classic boiler reset

    Worcester Greenstar Si & CDi Compact Boiler Reset

  • To reset the boiler, just press the “Reset” button.
  • You’ll see “Reset” and a little checkmark appear briefly.

    • If the reset works, your boiler will go back to normal and start running as usual.
    If it doesn’t, the alert code will show up again, and the blue operation/fault light will keep flashing.

    Greenstar Si and CDi compact boiler reset

    Worcester Greenstar i Boiler Reset

  • To reset the appliance, just press the reset button quickly one time.
  • You’ll see “Reset” and a little tick appear for a moment.

    • If the reset is successful, the appliance will go back to normal and start working as usual.
    If it’s not successful, the alert code will show up again, and the blue operation/fault light will keep flashing.

    Greenstar i boiler reset

    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 flash too.

  • To reset the boiler, press and hold the reset button for about five seconds. Once the boiler resets, the reset button light will turn off.
  • You’ll also notice the mains indicator will stop flashing.

    • Greenstar i junior boiler reset

    Worcester Greenstar Ri Boiler Reset

    If there’s a fault, the blue mains indicator light will start flashing.

  • To reset the boiler, turn the Central Heating temperature knob counterclockwise to the “RESET” position and hold it there for about five seconds. Then, turn the knob back to your original temperature setting.
  • Once the boiler resets, the mains indicator light will stop flashing, and your boiler will work normally—depending on your programmer and room thermostat settings.
  • If the power to your boiler has been interrupted, a reset fault might happen. Just follow the same steps above to reset it again.

    • Greenstar Ri reset

    Is your boiler still not working?

    Sometimes, resetting your boiler might not be enough to get it working again. If it keeps going into fault mode, it’s a good idea to call one of our Gas Safe registered engineers.

    KHS Heating & Plumbing has Gas Safe engineers ready to help you out, we can quickly and efficiently diagnose and fix your boiler so you’re back up and running in no time. Get in touch

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