Vaillant boiler warranty

What is a boiler warranty?

Vaillant Boilers are installed in our homes to heat and provide hot water for many years. While we expect them to be hidden from view so they can do their job, it is good to know that if something goes wrong then Vaillant will be there to fix it. It is crucial to not only find the right boiler model for you, but also the right warranty.

The standard Vaillant warranty period is between 1-10 years. If a longer warranty period is given to a model, it means that the manufacturer truly believes in it. However, it is not necessary to choose the Vaillant boiler with the longest warranty. The warranty may cover only labour costs or a specific part of the boiler, depending on the manufacturer.

Vaillant has moved to offer guarantees on boilers, rather than a warranty. This basically means that Vaillant will repair any boiler faults caused by the manufacturing process. This warranty is not the same as a guarantee, which is a promise by the manufacturer to inspect the problem.

This guide will help you to understand Vaillant’s guarantees.

Who is Vaillant?

Vaillant has been creating products for the heating market since over 140 years. They have created water heaters, Combi boilers, and other types of heat exchangers. Learn more about Vaillant and their entire range of boilers at Boiler Guide.

Standard Vaillant guarantee

Vaillant boilers are available with a 2-5 year parts and labour warranty depending on the model. However, many models have a 7-10-year warranty when installed by an advance Vaillant installer.

What is covered by the Vaillant guarantee

The difference between a warranty and a guarantee is that a warranty covers only boiler component failures. If the failure is caused by contaminated drinking water, you will be charged for the engineer’s visit.

Vaillant guarantees you the repair of defects in the manufacturing of your Vaillant appliance. One of our Vaillant Service Engineers will complete the repair and will be responsible for both labour and parts.

The guarantee does not cover any defects that are not related to the manufacturing of the product, or as a result from misuse. You will receive the complete terms and conditions of your guarantee together with your guarantee confirmation. You can also read them here.

Vaillant Group UK Limited (‘Vaillant’) Guarantee Terms and Condition

The following terms and conditions are required to receive the extended Vaillant boilers guarantee. If your installer informs you that there is a boiler problem, please contact Vaillant Service.

1. Within 6 months from the boiler’s despatch, installation and commissioning must all be done by a Gas Safe registered engineer.

2. All work must comply with these terms and conditions and the installation manual.

3. At the time of installation, the installer must complete the Benchmark log book and keep it on-site for inspection by engineers.

4. The date of installation will be the start of your guarantee. This Vaillant must be proven to have been purchased. An invoice or completed Benchmark logbook is required to validate this Vaillant. Without these documents, the guarantee will begin from the date of manufacture as indicated on the boiler dataplate.

5. Within 30 days of the installation of the appliance, the boiler guarantee must be registered. Failure to do so within the time frame will result in your guarantee being reverted to 12 months after installation. To register your guarantee and for further details go to our web site at:

6. You must enter the 28-digit serial number in order to register the appliance. This information is clearly displayed on the

  • Boiler packaging
  • Appliance data plate
  • Attach removable stickers to the boiler’s top
  • Back of the control box

7. According to the instructions of the manufacturer, the boiler should be serviced by a Vaillant engineer or another Gas Safe Registered engineer.

8. The Benchmark logbook must contain service details that can be inspected.

9. The guarantee does not cover the cost of annual servicing.

10. This guarantee is only for boiler component failures. It does not cover any other central heating system components (such as time controls, room thermostats, motorised valves, etc.). ).

11. Vaillant accessory or article other than the boiler (e.g. Control, and any accessory or Vaillant article other than the boiler, will be covered under a separate guarantee.

12. The boiler’s components will be replaced or repaired by Vaillant, or an authorized Gas Safe registered engineer.

13. Vaillant will not accept invoices from third parties for the repair or attendance of this appliance unless they have been pre-authorized in writing.

14. The guarantee for any repair or replacement parts (including boiler installation if necessary) does NOT extend the guarantee period to the appliance beyond its original term, as stated in clause 5.

15. Contaminated water in the boiler can cause a failure (e.g. Blockages or the influence of iron oxides, flux residues, limescale, and sludge, etc., can cause a boiler to fail. The engineer’s visit is charged at the current rates.

16. The guarantee will be null if the boiler is moved to another property without Vaillant’s consent.

17. The guarantee does not cover self-maintenance tasks like bleeding air, repressurizing the system, or freezing condensate pipes. Vaillant recommends that you contact your Gas Safe registered technician in these cases or the equivalent body

18. The guarantee does NOT cover fair wear and tear, wilful or accidental damage, unusual storage or working conditions, negligence by you, any third party, or failure to use or operate the products according to the operating instructions.

19. Installation in mobile leisure vehicles is not covered by the guarantee – i.e. boats, caravans etc.

20. The guarantee does NOT cover consequential losses that result from the breakdown of a Vaillant Boiler. 21. You will be charged for any non-boiler, installation or other system fault calls. This could also invalidate your warranty.

22. We are committed to safety and health. If engineers can’t gain safe access or gain access to the property, Vaillant will charge an abortive fee.

23. A refundable deposit may be required for calls to boilers during the guarantee period. This deposit will be needed prior to any work or visit. If the boiler guarantee covers the fault, the deposit will be refunded.

24. Vaillant reserves all rights to declare your guarantee null and void if these terms and conditions are not fully followed. Vaillant’s final decision on guarantee claims is final.

25. Vaillant can offer an extended guarantee product to cover repairs or annual services if this guarantee is deemed null and void.

26. This guarantee does not affect your legal rights regarding any product that is defective or not as described.

27. Any non-genuine Vaillant spare part in any repair will void the guarantee.

28. Please note that Vaillant may share your personal information with its business partners to help with the administration and registration of the guarantee.

29. Vaillant Group UK Limited (registered in England under Company Registration No. 00294316), of Nottingham Road Belper, Derbyshire DE56 1JT.

30. This guarantee is applicable to installation in domestic dwellings within the United Kingdom, Republic of Ireland and Isle of Man.

31. These terms are subject to English and Welsh law. Any dispute arising out of this guarantee shall be decided according to those laws, and before an English court or tribunal.

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