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Questions and answers

You have any questions about our Viessmann products? Here you will find answers for the most frequently asked questions. Our professional team has sorted these questions by topic and answered easily.

If you do not find what you are looking for, check out our forum or write an e-mail to Please feel free to contact us in case of any further information you may require. Our experienced staff is at your disposal:

  • Monday: 6 p.m. – 8 p.m.
  • Thursday:     10 a.m. – 12 noon
  • Hotline number: +49 06452 9340-27

Commander-Hotline – any questions about the Commander: We have setup a special Commander hotline. Please contact us:
Wednesday: 6 p.m. – 8 p.m.
Hotline number: +49 6452 9340-25

If you have any further interesting solutions for typical user problems, please write to us. We would be pleased to publish them here, so that other train hobbyists will also profit.