Warranty and Registration (GB)
Last Updated: 18 June 2026
Viessmann products are supported by manufacturer warranty terms provided by Viessmann UK.
Viessmann Direct supplies genuine OEM Viessmann products through authorised supply channels; however, product warranties, warranty registration, technical support and warranty call-outs are managed directly by Viessmann UK.
Warranty at a Glance
- Manufacturer warranties are provided by Viessmann UK.
- Warranty periods and registration requirements vary by product.
- Products should be installed, commissioned and serviced in accordance with Viessmann UK requirements.
- Warranty registration should be completed promptly after installation.
- Warranty claims, breakdowns and technical support should be directed to Viessmann UK.
- Viessmann Direct is unable to authorise warranty repairs or warranty call-outs on behalf of the manufacturer.
Who Provides the Warranty?
Manufacturer warranties are provided by Viessmann UK and are subject to the terms, conditions and registration requirements published by Viessmann UK.
Viessmann Direct is an independent merchant and is unable to approve, extend or amend manufacturer warranty terms.
Please check the latest warranty information directly with Viessmann UK before purchase, installation or registration.
Warranty Registration
Where warranty registration is required, this should normally be completed after installation and commissioning.
Registration requirements may vary depending on the product type, installer status and current Viessmann UK warranty terms.
For warranty registration and warranty checks, please visit Viessmann UK's warranty information page:
Viessmann UK Warranty Information
Installation, Commissioning & Servicing
To protect the manufacturer warranty, products must be installed, commissioned and serviced in accordance with Viessmann UK instructions and all applicable regulations.
Gas appliances must be installed and serviced by a suitably qualified Gas Safe registered engineer. Oil appliances must be installed and serviced by a suitably qualified OFTEC registered engineer. Heat pump and renewable products should be installed and commissioned by appropriately qualified professionals.
Failure to install, commission, register or service a product correctly may affect warranty entitlement.
Spare Parts, Controls & Accessories
Genuine OEM Viessmann spare parts, controls and accessories may be supplied with their own manufacturer warranty terms.
Warranty periods and claim procedures may vary by product. If you believe a spare part, control or accessory has developed a fault, please contact Viessmann UK or seek advice from a qualified heating professional.
Please retain your order confirmation and invoice, as these may be required as proof of purchase.
Breakdowns, Faults & Warranty Claims
For appliance breakdowns, warranty claims, commissioning enquiries, technical support or manufacturer warranty questions, please contact Viessmann UK directly.
Viessmann UK After Sales Support
Customer Services
01952 675000
aftersales-uk@viessmann.com
Need Help with an Order?
If your enquiry relates to an order placed with Viessmann Direct, delivery, returns or proof of purchase, our customer services team will be happy to help.
0333 123 1233
sales@viessmanndirect.co.uk