Warranty and product registration

Frequently Asked Questions

I have not received my Gas Safety Certificate or warranty document

If your installer is Viessmann Trained, please use this link to search for registered boilers: https://extendedwarranty.online/GSW If your boiler is not showing, please contact your installer to correctly register the boiler on your behalf. 

My warranty documents are showing incorrect details (Address, name, warranty length)

We will need to cancel your registration and the installer must re-submit with the correct details. Please email warranty-uk@viessmann.com and we will cancel your registration.

How do I find out how old my boiler is?

Please use this link to search for registered boilers: https://extendedwarranty.online/GSW

Can I extend my manufacturer's warranty?

You may extend your warranty length if your installer was Viessmann trained and you are within 30 days of the installation date.

What is covered under my manufacturer's warranty?

Our boiler warranty terms and conditions can be found here

How do I register my boiler for warranty?

  1. If your installer is Viessmann trained, please contact them to register the boiler on your behalf.
  2. If your installer is not Viessmann trained please use the non trained installer link
  3. If you would like to register the boiler yourself with the standard manufacturer warranty, please use the homeowner link.

What happens if I fail to register my boiler for warranty on time?

If the boiler is not registered within 30 days of the installation date, then a standard 2 year manufacturer warranty will apply.

What options are available to me if my boiler is out of warranty?

If your boiler is out of warranty and requires a service or repair, please contact our Customer Service Department on 01952 675060 or email aftersales-uk@viessmann.com

Key warranty facts

We use our best endeavours to ensure that our products are manufactured without any manufacturing or material defects. Our standard terms and conditions guarantee that we will fix or replace any manufacturing or material defects free of charge within a period of 2 years from the date of delivery.

When you purchase a boiler from Viessmann, you can be assured that you are buying a quality appliance backed up by years of engineering expertise. Each of the boiler models within our comprehensive range is equipped with cutting-edge technology and sets new benchmarks. To ensure that you are getting the most out of your Vitodens boiler during the course of its service life, we offer a range of warranty options which will provide you with peace of mind.

Many of our boilers come with a comprehensive 5 year parts and labour warranty, as standard. With other boilers, you have the option to extend this if it is installed by a Viessmann Trained Installer. Full details of the warranty information for specific boilers can be found below.

Please note that:

  • Viessmann product owners must ensure that the appropriate warranty registration is completed and their product is serviced annually to qualify for the 2nd (or 3rd, 4th etc) year of warranty, where required.
  • The product must be serviced either by a Viessmann Trained Installer or another competent servicing company (i.e. Gas Safe registered) within one year (and each following year) of the installation date and the details recorded in the ‘Benchmark’ or Viessmann service logbook (this should have been completed by your installer when your product was installed), where required.
  • The cost of the annual service is not included in the warranty.
  • To qualify for your warranty your installer may be able to register your product warranty on our website, www.viessmann.co.uk or Viessmann Trained Installer Portal www.viessmanninstallerportal.co.uk, or please complete and return the guarantee card found in the product pack within 30 days of the product being installed, where required.
  • The warranty does not cover issues related to installation and it may be necessary to charge a call out fee for service visits booked directly as a result of incorrect installation.
  • Viessmann will not reimburse any unauthorised third party costs incurred for repairs carried out while the product is under warranty. If in doubt please contact Viessmann After Sales Service.
  • In the event of a warranty callout, it is the responsibility of the customer/installer to provide safe working access to the product (this includes ladders, scaffolding, harnesses, etc).

Should your product develop a fault during its warranty period please contact your original installer, or alternatively Viessmann After Sales Service on 01952 675060.

Local Authority registrations

We operate a number of different warranty options depending on if you are a homeowner, an installer trained through the Viessmann Academy or a non-Viessmann trained installer.

Find all the details you need to get started on the link below.