I need to transfer the warranty of a Thermomix® unit. How can I process this request? Please contact Customer Service at 855.867.9904 or firstname.lastname@example.org . Please have the serial number of the unit as well as the original order number (if available) ready. Related articles What does error code C561 mean? Does Vorwerk® have an international service web page? What is the Trade-In Program? TM6 User Manual Can I change the contrast and/or brightness of the display on my TM6™? How can I change the volume and length of the notification sounds on my TM6™?