Warranty Overview by Product

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.

Solar Product Warranty

Vitosol 100-FM, 200-FM, 200-TM & 300-TM:

Specifically the warranty for the solar collectors only is 5 years from the date of delivery. During this period the warranty covers your solar collector against manufacturing/material defects for both parts and labour. All other components are covered by standard terms and conditions. Applies to collectors installed after January 2009.

Vitovolt 200 PV module:

MCS certificate number: MCS BBA 0007/4
The warranty is in-line with the manufacturers warranty and is defined in two categories.
Performance warranty:

  • The limited peak power warranty is defined in the manufacturers warranty certificate.

Manufacturer's output warranty in accordance with warranty certificate:

  • 5 years: 95 %
  • 12 years: 90 %
  • 15 years: 85 %
  • 25 years: 80 %

Specifically the warranty for the solar modules (type listed above), factory assembled DC connectors and cables only, is 10 years from the date of delivery. During this period the warranty covers your solar modules against manufacturing/material defects for both parts and labour. All other components are covered by standard terms and conditions. Applies to modules delivered after September 2011.

If solar modules fail to conform to this warranty, Viessmann will, at its discretion, either repair or replace the product, or refund the then current market price of the solar modules. The repair, replacement or refund remedy shall be the sole and exclusive remedy provided under the warranty and shall not extend beyond the period of the warranty.

SMA inverter

We recommend the use of SMA inverters with our solar modules.The inverter types covered by the warranty are listed in our price list.

For the above named products, you receive an SMA factory warranty valid for 5 years from the date of purchase. The SMA factory warranty covers any costs which you incur for repair or replacement parts during the warranty period, subject to the conditions listed below. This is not associated with a durability warranty.

You have the possibility of purchasing an extension of this SMA factory warranty within the 5 year term, this does not apply to the PV Offset Box. The cost will be based on the respective SMA price list valid at the time the warranty extension is taken up.

Scope of SMA factory warranty

The factory warranty does not cover damages that occur due to the following reasons:

  • Transport damage
  • Incorrect installation or commissioning
  • Failure to observe the user manual, the installation guide, and the maintenance regulations
  • Modifications, changes, or attempted repairs
  • Incorrect use or inappropriate operation
  • Insufficient ventilation of the device
  • Failure to observe the applicable safety regulations (VDE standards, etc.)
  • Force majeure (e.g., lightning, overvoltage, storm, fire)

Neither does it cover cosmetic defects which do not influence the energy production.

Vitocell 200-V/B:

The standard warranty for the stainless steel vessel is 25 years from the date of delivery, provided that certain conditions are met. During this period the warranty covers your stainless steel vessel against manufacturing/material defects for both parts and labour. All other components are covered by standard terms and conditions. Please contact Viessmann After Sales Service on 01952 675060 to confirm these conditions.

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.

Warranty 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.