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How to Reset Your Boiler

Resetting a boiler

To reset a boiler you’ll need to find and press the reset button.

Now, not all boilers can be reset in the same way. Some models only need a quick press of the reset button while others need holding for a number of seconds. The best way to find out how to reset your boiler is by checking the manual.

You can also stick right here as we'll explain why your boiler may have stopped working and how to reset it.

When to reset your boiler

Modern boilers have a safety feature where they lockdown when there’s an issue. This makes modern boilers very safe but can leave you with no central heating or hot water. Common boiler problems that cause a lockout include:

  • A fault in the system
  • Unsafe conditions to keep operating such as a bad supply of gas

You’ll know if your boiler has locked out because an error code will appear on the display screen.

Then, once the issue has been fixed, you’ll need to reset the boiler.

How to reset a boiler

All boilers have a reset button but its location and how to use it varies from model to model.

If you can't see the button, then check the manual that came with your boiler. This should also explain how to reset your boiler. In most cases though, once you've found the reset button you will need to:

  • Push the button and hold (for somewhere between 1-5 seconds)
  • Wait for the boiler to ignite (this could take several minutes)

Be careful not to press the button several times as this could make an issues much worse.

You'll be able to tell if the boiler has reset because the flame will ignite, the error code will disappear and you might see a green light (rather than red or orange). If the boiler hasn't reset then you should contact a qualified engineer who will be able to locate the fault.

As you’ll imagine, not only boilers reset in the same way. To find out how to reset your boiler, choose the manufacturer:


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How to reset a Baxi boiler

Only reset your boiler once any problems have been fixed. If you’re not sure why your boiler isn’t working, take a look at our Baxi Problems and Repair Advice.

Baxi boiler How to reset
EcoBlue Heat Push and hold the reset button for 5 seconds
200, 400 Press and hold the reset button for 5 seconds
600, 800 Press and hold the reset button for 1-3 seconds
Platinum, Platinum+, Duo-Tec Turn the selector switch to the R, hold for 5 seconds then let it go

How to reset Ideal boilers

Ideal boiler How to reset
Logic Turn the control knob round to reset then straight back to your desired setting
Logic+ Press the restart button
Vogue Push the small ‘r’ button

A boiler needs to be reset after a fault has been fixed. Find out Common Ideal Boiler Problems and Repair Advice.

How to reset a Vaillant boiler

The reset button on Vaillant ecoTEC boilers has an icon of a flame with a cross through it. Their ecoFIT Pure range of boilers also uses this same icon but it’s next to the reset button rather than on it.

Vaillant boiler How to reset
ecoTEC Plus Press and hold the reset button for 1 second
ecoFIT Pure Press and hold the reset button for 5 seconds

Don’t attempt to reset your Vaillant boiler until any issues have been fixed.

How to reset a Worcester boiler

Worcester boiler How to reset
CDi Classic Press and hold the reset button for 3 seconds
CDi Compact Press the reset button
Greenstar i Quick press of the reset button
Greenstar Ri Turn the circular central heating control to the ‘reset’ position and hold for 5 seconds
Greenstar Si Press the reset button
Greenstar 2000 Hold the up and down buttons at the same time until error symbols disappear
Greenstar 2000 Press and hold the up and down keys at the same time until ‘reset’ appears on the display
Greenstar i Junior Hold the reset button for 5 seconds

You’ll know if the reset has worked if the boiler starts working again. But your Worcester boiler may also let you know that it has reset when:

  • The reset button stops flashing
  • The word ‘reset’ appears on the digital display alongside a tick
  • Error code stops flashing

If there’s an issue with your Worcester boiler then it will need to be fixed before you should reset. Take a look at the Worcester Boiler Problems and Repair Advice.

Why has my boiler locked out?

There are many reasons why your boiler might have shut itself down but some issues are more common than others.

Water pressure

If the water pressure is either too low or too high your boiler could stop working altogether, not just lockout. You can find out the water pressure by looking at the pressure gauge; you should aim to keep it at around 1 bar.

Ignition failure

Many boilers will lockout after 3 failed attempts to ignite. There are several reasons why this might happen (e.g. blocked burner, insufficient gas pressure) and you should contact a heating engineer to take a look.

Heat exchanger blocked

A build-up of limescale or sludge on the heat exchanger can restrict the flow of water and result in kettling. It’s given this name because the blockage can make sounds similar to a kettle.

Some of the faults you can resolve yourself but if you have any doubt get in touch with a qualified engineer who will be able to get your boiler back to working order. By using Boiler Guide, you can get free quotes from up to 3 trusted engineers in your area who will each offer you a quote, allowing you to compare and pick the best one.

Boiler not turning on after resetting

You've repaired the fault, reset the boiler and are well on your way to getting the boiler going again only for it not to ignite. In this case, you'll need to look further than the issue that the fault code displayed.

  • If the original fault code wasn't about the boiler pressure then check the pressure gauge to see if it's too high or too low – the needle should be sat around 1 bar
  • Ensure that there is power getting to the boiler. You'll be able to tell because the display screen will be lit. This is particularly common after a power cut and it's a good idea to check your fuse box.

Get a more reliable boiler

A boiler that needs resetting on a regular basis probably has an ongoing fault within the system, such as:

  • A faulty pump
  • Leaking from the system
  • A blocked plate heat exchanger
  • An electric part of appliance needing to be replaced.

If you're having to reset your boiler then your boiler may be on its last legs. So it’s time to consider a brand new one.

Boiler Guide Team

About the author

Boiler Guide Team

Boiler Guide has been home to a host of heating experts who have helped millions of UK homeowners searching for advice and guidance. If you’ve got heating questions, we’ll have the answers.

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