2020 Holiday Schedule for Technical Support

Our normal business hours are 8:00 am to 5:00 pm (Eastern Time) Monday through Friday.

Our office will be closed for the holidays from:

• December 24 to 28
• December 31 (starting at 12:30 pm) to January 1

We will be open from Tuesday December 29 until Thursday December 31 at 12:30 pm.

If you have a Viessmann fault code, please take a look at our Fault Code Checker for troubleshooting information.

If you are looking for a contractor in your area, please visit our Contractor Locator.