How To Reset a Worcester Boiler Troubleshooting DIY Guide

James Elston
Written by James Elston
Updated on 4th December 2023
Posted on 30th November 2023
reset a worcester boiler

Resetting a Worcester Boiler – How to do it yourself

worcester bosch logo

It is important to know how to maintain your home. Our guide will show you how to reset a Worcester boiler.

It may be worth trying to reset the boiler if you’ve had a boiler problem or boiler lockout. It could be as simple as a computer repair. Modern boilers are more complicated than ever. Resetting the boiler will not fix the problem as there may be other issues.

You must take care of your boiler. You should also know how to reset it in case it stops working. This will save you money and allow you to get hot water again in no time.

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How can I reset my Worcester Boiler?

If you have a blue light flashing on your Worcester boiler, a simple trick is to press and hold the reset button on the boiler control panel’s back to reset it. Hold the button down for at most 3-5 seconds to ensure that your boiler is correctly reset. Recheck the boiler to make sure it is working.

Your boiler might not have a reset button. It might still have a light that can be used for resetting the boiler. This light is located on your thermostat dial. Turn the dial down to reach the reset light.

Once it is in its place, hold it for approximately 3-5 seconds until it returns to its original position. Finally, make sure everything is working as it should. If your Worcester boilers stop working, you can avoid long periods of cold.

Worcester boiler on/off switch

If you can’t find the reset button for whatever reason, another way is to find the on/off switch on your Worcester boiler by turning it on and off again. If you do turn the boiler off, make sure that you turn it back on again after about 30 seconds to ensure that if your boiler is working fine, it continues to do so afterwards.

What do I need to know about how to reset a Worcester boiler?

Understanding how your boiler works is key to avoiding freezing and heating up in the winter. You can get your boiler back online by setting it up.

You should refer to your user manual if you see an error code. To have your system running again, contact a Gas Safe registered engineer. Any other issues will be quickly and easily diagnosed by most boiler engineers and the last time your Worcester boiler was reset may have been during its last Worcester Bosch boiler service.

When to perform a Worcester boiler reset

If your Worcester boiler has stopped working and or the blue light is flashing, it may sometimes just be worth trying to reset it and it may sort the problem out.

Although more often than not there will be an error code that is showing and you may need to restart the boiler to clear this off. Here are some reasons why you may need to turn your boiler on and off and do a full reset:

Common Fault codes for Worcester Boilers

Worcester boilers are well-made and durable. You can expect faults to develop over the life of your Worcester boiler. These are the most frequent Worcester boiler fault codes.

  • EA – To inform you that your boiler has stopped heating.
  • D1 – This is an alarm for excessive heat or damaged sensor – seek professional assistance immediately
  • E9 – Possible damage to the main heat exchanging unit. Seek professional assistance immediately
  • C1 – Damaged fan – Get professional assistance immediately
  • A1 – The boiler system is empty of water. To check the temperature of the boiler system, turn on the pressure gauge. If it is not, re-pressurize it. If all else fails, contact an engineer.

Many property owners avoid calling for assistance when their boiler stops working. This can be dangerous and dangerous. Your chances of fixing your boiler are greater if you call immediately the engineers. This will reduce the cost of repairs and make your home more secure.

How to reset your Worcester 4000

A Worcester 4000 boiler will display a message with an icon in its right corner.

The icon’s color will depend on the severity of the fault. Text is used to display the fault code (e.g. The display screen displays the fault code 232 in text.

Continue to press the up-and-down arrow keys, until you see “Reset”.

Your Worcester 4000 will then start again at the current temperature.

Worcester Greenstar Si & CDi Compact Boiler Reset

To reset the boiler, press “Reset”.

After clicking “Reset”, a tick will briefly appear.

The boiler will return to normal operation if the reset succeeds.
If the reset fails, the alert code will be displayed again and the blue operation/fault light will continue flashing.

Worcester Greenstar CDi Boiler Reset

Press the reset button [2] for three seconds

The blue light flashing will stop at the reset button [2] and fault indicator [3].

If the reset was successful, the boiler will work again and start to fire up.
If the reset fails, the alert code will display again and the blue flashing light on the boiler will continue.

Worcester Greenstar i Boiler Reset

To reset your appliance, press reset one time.

After clicking “Reset”, a tick will briefly appear.

The appliance will return to normal operation if the reset succeeds.
If the reset fails, then the alert code will be displayed again and the blue operation/fault light will continue flashing.

Worcester Greenstar Ri Boiler Set

The blue mains light will flash if there is a fault to indicate it and you may have a boiler lockout.

Turn the Central heating temperature knob clockwise until it reaches the “RESET” position. For approximately five seconds, hold the button down and then return to the original temperature setting.

When the boiler is turned off, the main indicator will cease flashing. Depending on the program and room thermostat settings, the boiler will function normally. A reset fault condition is observed if the boiler’s electric power is cut. Reset the boiler as described above.

The boiler will return to normal operation if the reset succeeds.
If the reset fails, the alert code will be displayed again and the blue operation/fault light will continue flashing.

Worcester Greenstar i Junior Boiler Reset

One second per fault, the reset button will flash and the blue mains indicator blink.

To reset the boiler, hold the reset button for approximately five seconds. After the boiler has been reset, the reset button will not light up.

The main indicator will stop flashing.

Contact the customer service/contractor or Gas Safe engineer if the fault persists. You should also give them the device data and the displayed fault code.

Worcester Bosch boiler replacement

Now you know how to reset a Worcester boiler, if the problem persists, it may be an idea to consider buying new boiler replacement, especially if you have an old Greenstar model. Worcester Bosch are considered by many to be the best combi boiler on the market right now, but it may be worth having a look yourself to see which one is best suited to you.

Boiler installation is something else to consider when getting a new boiler as good installation can go a long way for your boiler’s efficiency and lifespan. Boiler Central have great deals on new Worcester Bosch boilers with installation included, so you don’t have to worry about constantly resetting your boiler anymore.

Get a quote in 20 seconds for a new Worcester Bosch boiler – click here

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Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 30th November 2023

James Elston is our resident boiler and heating expert here at Boiler Central. With over 20 years in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutioons. This can be from simply procuring the latest new boilers, to reviewing ensuring that Boiler Central maintains the highest standards across the workforce from office to your home.

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