Viessmann (Schweiz) AG — Gewerbestrasse 1, 3421 Lyssach, Switzerland

The service at the Bern branch was abysmal right from the start, even during the initial delivery of the system. In 2023, employees were described as rude and unhelpful. Since the beginning of December 2024, I have sent countless emails and made numerous phone calls to try and secure a service contract or obtain information about it. No information about this was provided when the system was commissioned in 2023. Finally, in February, I ordered and received the service contract via a form on the Viessmann website, but I had to find that form myself. My emails remain unanswered to this day, including those forwarded internally. The service at the Bern branch has truly disappointed me. Based on this experience, I will never install another Viessmann heat pump.

Pablo Di Lione