N
Glam Journal

Why is the reset button flashing on my Worcester boiler

Author

Matthew Perez

Updated on April 21, 2026

Slowly flashing blue light, and a flashing lockout reset button – This usually means that there is a lockout with the ignition. Make sure that there is gas present and that your boiler is at the right pressure levels. Next, you want to check the Combustion CO2 level.

Why is my boiler flashing reset?

Usually, when modern boilers need resetting they will display a fault code or begin to flash a red or green light. These signals indicate that your boiler senses a problem, which is why it has stopped working and needs to be reset.

What does the reset button do on a Worcester boiler?

Worcester Greenstar Ri Boiler Reset When the boiler resets the mains indicator will no longer be flashing and the boiler will function normally, dependant on the programmer and room thermostat settings. A reset fault condition will exist If the electrical power to the boiler has been interrupted.

Why is my Worcester boiler flashing?

Although a flashing blue light is most common, some Worcester boilers have a flashing red light. This usually indicates that your boiler needs servicing by a professional heating engineer. … The boiler has no gas supply. The gas pressure has dropped too low.

How do you reset a Worcester boiler?

When you need to reset your boiler, simply press and hold the reset button that can be found on the front of your boiler control panel. You need to hold the button down for 3-5 seconds to ensure that it is reset before re-checking the system to make sure it is working.

How do I reset my Worcester 28cdi boiler?

The appliance can be reset by pressing the reset button and holding in for 5 seconds. Check that the gas supply has not been interrupted. If this condition continues to occur, then call a service engineer.

Why is my boiler pilot light flashing?

The blue light on an RI will flash when it detects no gas supply, or low pressure. This could be a range of things such as a faulty gas valve. As this issue relates to gas, contact a heating engineer straight away. Another common cause of a blue light flashing is a blockage in the flue.

Why is my Worcester boiler not working?

If you think your Worcester boiler is not heating water, there are a few scenarios that could be behind the problem. Possibilities include a faulty diverter valve, a lack of power, a stuck Y/S-plan valve, faulty PCB unit, or even a problem with the central heating pump.

Do I need to press the reset button on my boiler?

Often, a boiler can be returned to normal working order by resetting it. This is done by pressing the button or turning one of the thermostats to reset for 3 seconds before turning the stat back up. … If your heating isn’t coming on and you’ve checked the power supply and pressure you may need to reset the boiler.

Should the blue light be on on a Worcester boiler?

The blue light on a Worcester Bosch boiler is typically there to highlight that the boiler has power going to it. … In addition, it may point to a socket failure – it is worth checking a few other appliances in the house to check that they work OK, using the same socket that the boiler is usually plugged into.

Article first time published on

Where is the error code on a Worcester boiler?

The boiler will display an alphanumeric fault code to indicate the fault group. A three-digit number that can be accessed via the info menu by pressing the spanner/return button during a blocking error or when in normal operating status. The cause code should flash on the display during a locking error.

How do I reset my Worcester Greenstar 2000 boiler?

In most cases, you will simply need to hold the button marked ‘reset’ for three seconds. In some models you may see a reset light at the end of the temperature dial. In this case, just turn the dial down to the reset light, leave it there for three seconds and then turn it back to its original position.

Why does my boiler go into lockout?

What Does Lockout Mean on a Boiler? A boiler lockout is a shut-down procedure that initiates when a boiler is not working within certain tolerances. Boilers can lock out due to low/high water pressure, lack of, or no fuel supply (gas, LPG or oil), a blockage in the system, or the lack of power to electronic components.

How do I reset my Worcester boiler Greenstar 30si?

►To reset boiler press the reset button. The reset button will no longer be illuminated and the mains indicator will stop flashing. The boiler will function normally, dependent on programmer and room thermostat settings.

How do I reset my Worcester 24i junior boiler?

The appliance can be reset by pressing the fault indicator button and holding in for 5 seconds when the appliance has cooled. If this condition continues to occur, then call a service engineer. The appliance will enter a lockout condition in the event of the burner failing to ignite.

How do you reset the pilot light on a boiler?

  1. Find the pilot light assembly and its reset switch. The furnace’s pilot light is usually positioned at the bottom of the unit by a knob. …
  2. Set the reset switch to off. Turn the knob to the “Off” setting. …
  3. Wait a moment. …
  4. Relight the pilot light. …
  5. Observe the furnace.

Why does my Worcester combi boiler keep firing up?

If your combi boiler fires up then turns off then this is likely to be the ‘preheat’ function. This is nothing to worry about and simply ensures there’s some hot water ready to be sent to the taps when you need it. However, if it keeps firing up then quickly turns off again, this could be a sign of short cycling.

Do Worcester boilers have a pilot light?

I’m sorry to hear of the problems you are encountering with your Worcester Greenstar condensing boiler. We are a little confused with your comments though as the Greenstar doesn’t have a pilot light, the boiler has a fully automatic ignition system.

How do I reset my combi boiler?

REsET PROCEDURE To reset boiler, turn the mode control knob (D) to reset position and immediately turn knob back to required setting. The boiler will repeat the ignition sequence. If the boiler still fails to light consult a Gas Safe Registered Engineer or in IE a Registered Gas Installer (RGII).

What does HH mean on a Worcester boiler?

The symbol something like a hh or HH with missing digits indicates the boiler is in a form of commissioning mode. When some Worcester boilers are first turned on they will fill the siphon and display this symbol. Interruptions in power supply to the boiler can result in a reentering of this mode.