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How Do I Reset My Vaillant Boiler? How do you clear the fault code on a Vaillant boiler?

My Vaillant Combi Failed, How Do I Reset My Vaillant Boiler? How do you clear the fault code on a Vaillant boiler?

Subject: Vaillant - Sub Subject: Boiler
Date: 12/3/2021 Status: SOLVED
7 answered / 12 voted, viewed icon 349 viewed.
Solved - The best Reply Askme - Wednesday, January 11, 2023 482

To reset a Vaillant boiler, you will need to follow a specific set of steps depending on the type of boiler you have. Here are the general steps for resetting a Vaillant boiler:


  1. Locate the boiler's reset button. This is usually located on the front or side of the boiler and is often marked with a symbol or the word "reset."
  2. Press the reset button and hold it down for a few seconds.
  3. Release the button and wait for the boiler to restart.
  4. If the boiler does not restart or the error persists, you may need to refer to the boiler's user manual or contact a qualified heating engineer for assistance.

Note: Each Model of Vaillant boilers may have different instructions to reset, please refer to the user manual of your specific boiler model.

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ANSWERS Write an Answer

❝How Do I Reset My Vaillant Boiler? How do you clear the fault code on a Vaillant boiler?❞ answers. Askme asked first. Total 7 replies.

Askme - Friday, December 3, 2021 411

How Do I Reset My Vaillant Boiler?


How Do I Reset My Vaillant Boiler?


Vaillant / Boiler You may have on a Vaillant fault code. Don't worry if you have fault code, it does'nt neccessarily mean your boiler is at fault. Your boiler may just need resetting or you may have an issue that is easily resolved.



  • The boiler’s reset button will feature a flame, flashing light, or a cross and should be clearly labelled RESET in your instruction manual. Your boiler’s instruction manual will help you recognise this, as a detailed diagram of your specific model will be included.
  • Only press and hold press for 3 seconds the reset button once as you may cause damage to the boiler’s control panel if this button is repeatedly pressed. This could then lead to additional repair costs.
  • Once you have held down the button for 3 seconds, you should be able to identify whether your boiler has been reset as changes will occur on the display. If a fault code remains in place following a reset, we recommend that you contact a technical service for assistance to investigate the problem further.


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technician - Saturday, December 11, 2021 413

Wall hung room sealed fan assisted condensing boilers

  • ecoTEC plus 612
  • ecoTEC plus 615
  • ecoTEC plus 618
  • ecoTEC plus 624
  • ecoTEC plus 630
  • ecoTEC plus 637
  • ecoTEC plus 824
  • ecoTEC plus 831
  • ecoTEC plus 837
  • ecoTEC pro 24
  • ecoTEC pro 28


Vaillant boilers reset button

Vaillant boilers reset button

Vaillant / Boiler Reset button for Vaillant boilers: ecoTEC plus 612, ecoTEC plus 615, ecoTEC plus 618, ecoTEC plus 624, ecoTEC plus 630, ecoTEC plus 637, ecoTEC plus 824, ecoTEC plus 831, ecoTEC plus 837, ecoTEC pro 24, ecoTEC pro 28

Tips! How to use reset button? To reset the fault, press the reset button and hold it down for one second.

8. “Reset” button 9 Maximum radiat

Ignition problems

If the burner fails to ignite after five attempts, the device does not start up and switches to “Fault”. This is indicated by the fault code “F.28” or “F.29” in the display. On ecoTEC plus appliances the display also shows the flame symbol with a cross through it. On ecoTEC pro appliances, the red LED also lights up. Automatic ignition can only take place after you manually reset the fault.

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PhotographyPro - Saturday, June 3, 2023 389
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