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Viessmann: The Industrial Giant's Digital Transformation
How a 100-year-old heating giant is navigating the digital shift with 85K monthly visitors
Viessmann isn't just selling boilers anymore. With 85,415 monthly website visits and a 1.7-star Trustpilot rating, the German industrial giant's digital presence reveals a fascinating clash between legacy engineering and modern customer expectations.
"Viessmann's website traffic shows a brand that's trusted by name but struggling to convert that trust into digital satisfaction."
The Legacy Infrastructure Problem
With 292 employees and $22.4M in revenue, Viessmann operates in the heavy industrial space where physical products dominate. Their tech stack—Tailwind, Bootstrap, Ant Design, Astro, and Storyblok—reveals a modern CMS-driven approach attempting to retrofit a legacy B2B model. The 56% direct traffic suggests strong brand recognition, but the 1.7-star rating exposes a critical disconnect between engineering excellence and customer experience.
The Digital-First Pivot
The keyword data tells a revealing story: 30,390 monthly searches for 'viessmann' dwarf all other terms. Yet 'vibooks' (1,420 searches) and 'viessmann.com myportal' (480 searches) show they're building digital services around their hardware. This isn't just a manufacturer with a website—it's a company trying to transform into a climate solutions platform, using Storyblok for content management and Astro for performance.
The trust gap is stark. For a company operating in a sector where reliability is paramount, a 1.7-star rating from 19 reviews suggests systemic customer service issues. The 46.6% traffic from undefined geographies (likely Germany and EU markets) indicates a strong European base, but the lack of global ranking suggests limited international digital penetration.
- Brand recognition is strong (56% direct traffic) but customer satisfaction is critically low (1.7/5 stars)
- Digital transformation is underway with modern tech stack (Astro, Storyblok) but legacy B2B mindset persists
- Keyword strategy focuses on branded terms, missing broader 'climate solutions' or 'heating systems' opportunities
- Heavy industrial positioning with 292 employees suggests a lean, focused operation rather than a scaled tech platform
Viessmann is at a digital inflection point
The 100-year-old German manufacturer must decide: remain a hardware company with a website, or evolve into a true climate tech platform. Their modern tech stack suggests ambition, but the 1.7-star rating reveals execution gaps that could sink digital transformation efforts.
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Home | Viessmann.com
Erfahren Sie hier mehr über die Viessmann Generations Group und Viessmann Climate Solutions inklusive weiterführender Links zu den Webseiten.
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Reviews (3)
I am extremely disappointed with my…
I am extremely disappointed with my experience with the Viessmann Vitocal 250-A heat pump (Serial: 7975117301435128). After two full heating seasons of apparently normal operation, the unit started to behave very poorly. It triggered the electric heater unnecessarily, showing huge energy consumption (nearly 80 kWh/day) and pushing 60 °C water into the wrong circuit, which overheated my home. What should be a defrost cycle turned into a wasteful and incorrect operation. Communication with service has been very frustrating. One technician mentioned it might be a software issue but then stopped answering calls. Another blamed the lack of a check valve — yet the system worked fine for years without it. No clear technical explanation was given. I was told to choose between adding a check valve or replacing a key valve inside the unit with a cheaper ON/OFF type — and that I would have to pay ~1500 for it. No clarity on how this affects efficiency or why the pump worked fine for years. Overall: • Unreliable functioning after just a few years • Lack of clear technical support • Conflicting service advice • No real solution offered I do not recommend Viessmann’s heat pump service experience — especially when you need prompt, reliable heating assistance in winter.
Disappointing experience with Viessmann heat pump
Disappointing Experience with Viessmann Air-Source Heat Pump - Ongoing Issues After 1.5 Years ⭐☆☆☆☆ We converted to this Viessmann air-source heat pump heating system 1.5 years ago, and unfortunately, it has been nothing but problems since installation. The Core Problem: The pump consistently fails to work properly whenever temperatures drop. Today, for example, it's around 0°C outside and our indoor temperature has dropped to just 15°C - the system is completely failing to heat our home. This is precisely when we need reliable heating most - during freezing weather - yet that's exactly when the system fails us. Frequent Software Updates Causing Additional Problems: The system requires very frequent software updates, which themselves often lead to new malfunctions and disruptions. Rather than improving performance, these updates seem to introduce additional issues that require yet more service calls. Service Nightmare: Over the past 18 months, we've had to contact service technicians approximately 15 times. Installation Company (Witti, Lower Austria): Mr. Witti, who installed the system, has provided absolutely no support in resolving these recurring errors. He is essentially unreachable by phone, making it impossible to get assistance from the company responsible for the installation. Service Technician (Ing. Marek): Even the service technician recommended by Mr. Witti - Ing. Marek - has only provided superficial attention to the problems, failing to identify or fix the root cause. Bottom Line: After 1.5 years, countless service calls, problematic software updates, and still sitting in a 15°C house when it's freezing outside, I cannot recommend this Viessmann heat pump system - particularly when installed by Witti. The combination of unreliable hardware performance, software issues, and complete lack of proper after-sales support has been extremely frustrating and disappointing. We are left without adequate heating precisely when we need it most.
Air to water viessman heat pump 100A
Air to water viessman heat pump 100A From the first day the heat pump was fitted it was faulty. Viessman replaced controller Hot water temp sensor Reprogrammed the system approx 4 times Fault legionella cross flashing all the time The controller to controll temp set at 21 c ,but would keep heating to 24 c 27 vetch heating would not stop at the temp set on the system. Outcome €2800 cost electric in 10 months for a 2 bed bungalow Pcb replaced and programmed After 3 months fault returned Pcb replaced again and programmed Also first night running it rattled and then went quiet.Reported this to the installer. Controller E851 Code On inspection wiring loom to inverter burnt Loom replaced Capacitor block or board also replaced O by the way we have gone from overheating to no heat. This was all videoed and sent to representatives for viesmann as it was happening. Heating off over the summer but the electric cost still high just heating the hot water. Approx 18 months on back to square 1 Legionella cross flashing again original fault. Nov 2024 Reprogrammed system again. 7 March 2025 heat pump tripping out isolator switch in the fuse block Sorry in nov 2024 the manger or representative for viessman said to stop sending him videos of the system failure. Outcome I stopped sending him videos. Compressor failed on the 7/3/2025 no heat. After being checked by a third party who diagnosed compressor failure on the8/3/2025 Outcome viessman attended the morning of the 10/3/2025 and fitted an upgraded model 100A B model The Manger for Viessmann never rang never apologised and never even told me he was going to fit the heat pump. Maybe he fitted the new heat pump because I said my videos would go elsewhere.
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About viessmann.com
Erfahren Sie hier mehr über die Viessmann Generations Group und Viessmann Climate Solutions inklusive weiterführender Links zu den Webseiten.
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Technology Stack
viessmann.com uses 7 technologies across their website including Storyblok, Google Analytics, DaisyUI, Ant Design, and more.
CMS
Storyblok
Analytics & Marketing
Google Analytics
UI Libraries
DaisyUI, Ant Design
CSS Frameworks
Bootstrap, Tailwind CSS
Frontend Frameworks
Astro
Traffic & Audience
viessmann.com receives approximately 85.4K monthly visitors. The website has a bounce rate of 40% with visitors viewing an average of 1.9 pages per visit. Users spend an average of 1:27 on the site.
The majority of viessmann.com's traffic comes from undefined, undefined, .
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