Worcester Bosch Greenstar Boiler Reset Instructions

How to reset a Worcester Bosch Greenstar boiler

If your Worcester Bosch Greenstar boiler suddenly stops working or shows a flashing blue light, performing a reset may quickly restore it. This guide explains how to reset your boiler, so you can get your heating and hot water back on safely and efficiently.

Common Reasons Your Worcester Bosch Greenstar Boiler Might Need Resetting

Knowing the reasons behind your boiler needing a reset can help prevent recurring issues. Common causes include low water pressure, frozen condensate pipes in cold weather, blocked air vents, or thermostat problems. Additionally, power outages and disruptions to the gas supply can also cause the boiler to enter fault mode.

Although a basic Worcester Bosch Greenstar boiler reset often resolves the issue, ongoing errors may signal a more serious internal problem like a malfunctioning sensor, diverter valve, or heat exchanger. Be sure to look for warning codes or flashing lights on the display panel, as these offer valuable insights into the root cause. If your boiler requires frequent resets, it’s a clear indication that professional service is needed. Regular maintenance and annual servicing can help identify and fix minor problems before they turn into expensive repairs.

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

Worcester Greenstar CDi Classic Boiler Reset

Tools needed to bleed your radiators:

Press and hold the reset button [2] for three seconds.

The reset button [2] and fault indicator [3] will stop flashing.

If the reset is successful, the boiler will resume normal operation.
If the reset fails, the alert code will reappear and the blue operation/fault light will keep flashing.

Worcester Greenstar Si & CDi Compact Boiler Reset

Press the “Reset” button to reset the boiler.

“Reset” along with a tick will briefly appear on the display.

If the reset succeeds, the boiler will resume normal operation.
If it fails, the alert code will reappear, and the blue operation/fault light will keep flashing.

Worcester Greenstar i Boiler Reset

Briefly press the reset button once to reset the appliance.

“Reset” and a tick will briefly appear on the display.

If the reset is successful, the appliance will resume normal operation.
If not, the alert code will reappear, and the blue operation/fault light will continue flashing.

Worcester Greenstar i Junior Boiler Reset

If a fault occurs, the reset button will flash once per second and the blue mains indicator light will flash.

Press and hold the reset button for about five seconds to reset the boiler. The reset button light will go out once the reset is complete.

The mains indicator light will stop flashing.

Worcester Greenstar Ri Boiler Reset

When a fault occurs, the blue mains indicator light will flash.

To reset the boiler, turn the central heating temperature knob anticlockwise to the “RESET” position and hold it 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 the boiler will operate normally, depending on your programmer and room thermostat settings. Note that a reset is required if the boiler’s electrical power has been interrupted. Follow the steps above to reset the boiler.

Is your boiler still malfunctioning?

Sometimes, resetting your boiler isn’t enough to fix the issue. If your boiler continues to enter fault mode, it’s time to call a Gas Safe registered engineer.

Andy Gas Southern has Gas Safe engineers ready to assist you. We can quickly and efficiently diagnose and repair your boiler. Request a boiler quote