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viessmann

The Viessmann Group is a German manufacturer of heating, industrial, and refrigeration systems headquartered in Allendorf (Eder), Germany. With 23 production companies in 12 countries, distribution companies and representative offices in 74 countries and 120 sales offices throughout the world, Viessmann is international in its orientation. 55 percent of turnover is generated abroad. Since January 2018, the company is led by Martin Vießmann (Chairman of the Executive Board), Maximilian Viessmann (Co-CEO) and Joachim Janssen (Co-CEO).The company was founded in Hof an der Saale in 1917 by Johann Viessmann, and has been family owned for four generations. As of 2019, the company employs 12,300 people and reports annual sales of € 2.65 billion.

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  1. P

    maximum heating ouput on a viessmann

    Does anyone know what this parameter on the newer viessmann 100-w (B1KF) range does ?
  2. grumpydad

    £190 for extra 2 years warranty worth it? Viessmann

    Just about to order a Viessmann 100w. Comes with 10 year warranty. Or £190 extra for 12 years. The company I am going to use boiler hut, offer a Viessmann service for £100, I was going to skip the 2 year extra warranty, and put the money to getting Viessmann annual services. For example...
  3. S

    Viessmann Radiator Thermostats

    I was curious as I saw these that work with the entire Viessmann control centre and wondered if anyone has installed them. They come in various packs of single, 2, 4, 6 stats. They connect to the ViCare app and control, not sure what they do and how you control them. Or how they play if you...
  4. J

    Boiler keeps heating despite water being shut off

    Hi! I have an anusual issue with my gas boiler Viessmann Vitodens 100. When I open hot water, the boiler fires up and starts heating the water. However, when I shut the water off, the boiler seems not to understand that there water tap is closed and it just keeps heating till it gets to 90...
  5. P

    Getting the flow right…

    Just had a lovely Viessmann 222-F installed along with a HUGE 5.5kw triple panel radiator, almost next to it, to heat three rooms knocked into one. If I open the large rad valve enough to heat the large room (I’m guessing that) the return temp to the boiler is quite high, and the boiler is...
  6. G

    Boiler options - Ideal, Worcester Bosh, or Viessmann?

    Evening Hopefully you're not sick of this type of question! I've had a few quotes for a boiler upgrade (going from a regular boiler (~15 yrs old, on its last legs) to a combi) - all recommending different brand/model of boiler, and all company's are saying that their recommendation is the best...
  7. stings27

    Viessmann rf stat problem

    Hi all. Recently moved house and have a viesssmann vitotrol 100 UTD-RF stat. I have looked thro the operating instructions and to be honest, it might as well have been written in Chinese. Can anyone tell me if you can completely reset it so as I can put my own program in it ? (P3) When you...
  8. D

    What does the internal bypass valve do in a Viessmann combi?

    Could someone please explain what is the function of the internal bypass valve in a Viessmann combi and how its settings MIN/MAX or malfunction somehow would affect operation of DHW and heating? Thanks in advance.
  9. SUNEKTM

    Viessmann Vitodens 100 Connecting hot Water tank

    Hi, My dad and I have used all day to connect a external water tank to our Viessmann Vitodens 100 Boiler. For some reason the 2 hoses we have connected to the boiler neither gets hot (i believe 1 should get hot) and we are at a loss. Is there a configuration to do on the dash, or any things we...
    • SUNEKTM
    • Thread
    • connecting hot hot water tank viessmann vitodens water water tank
    • Replies: 2
    • Forum: DIY Plumbing Forum
  10. D

    Viessmann rubber hoses problem

    Are the rubber hoses known to fail on the 2016-2019 Viessmann Vitodens 100W? I've been dealing with circulation issues inside the boiler and I've found some anecdotal reports online of "crunchy hose syndrome" aka black granules or flakes. Some photos of the issue from several youtube vids...
    • dr911t
    • Thread
    • america hoses problem rubber usa viessmann
    • Replies: 10
    • Forum: USA
  11. O

    Viessmann Vitodens 100-W Radiators not hot enough.

    Just recently my bungalow radiators have not been getting hot enough to heat the rooms sufficiently enough. My domestic hot water temperature is fine. My radiators have TRV's and are not stuck. When operating in the Heating mode the boiler temperature gauge runs at about 60 degrees C. We have a...
  12. D

    Viessmann Vitodens 100-w trouble maintaining central heating temp

    I have a 2017 Viessmann Vitodens 100-W condensing gas boiler connected to a radiant floor heating manifold. No external pump. 120m2 floor area. Recently had the annual service. Boiler has been on for about a week now heating the underfloor cement slab. It is my impression that the boiler seems...
    • dr911t
    • Thread
    • 100-w america central central heating central heating system heating temp trouble underfloor heating usa viessmann vitodens
    • Replies: 99
    • Forum: USA
  13. D

    Viessmann oil boiler advice

    Hi all, I’m looking to install a central heating system in a 3 bed 1860’s solid stone walled cottage. It only has a coal fire at present so it will be a complete system from scratch. We are keen to future proof it to some extent. our thoughts are a Viessmann oil boiler connected to a thermal...
    • Dalesdipper
    • Thread
    • advice america boiler oil oil boiler solar thermal store usa viessmann
    • Replies: 5
    • Forum: USA
  14. A

    Viessmann low rumble.

    Hello everyone., Looking for some advice please, Ive got a Viessmann 111w installed, 18 months old and been serviced by manufacturers as per warranty conditions. Boiler works ok lots of hot water etc but when the heating is on there is a low rumble from the boiler when the burner cuts out, does...
  15. N

    Viessmann 100-W B1KA Fuel Consumption

    Hello, I have a Vitodens 100-W B1KA Combi boiler installed in a new build. In the first 4 months of use the boiler has burned on average 500 litres/month. Not sure what I was expecting but that seems high. Any dieas of what I can do to improve it? I've eliminated any ramping by keeping the zone...
  16. S

    Worcester Greenstar 8000 Style 50kW versus Viessmann Vitodens 111-W 35kW Storage Combination Boiler

    I would be grateful if I could have some details about both of these boilers. so I was thinking of a point system from 0-10 on the followings and any details you could share I would be most grateful. 1.Built quality 2.durability 3.customer service 4.ease of servicing 5.user interface I live in...
    • shaya88
    • Thread
    • boiler combination greenstar storage style viessmann vitodens worcester
    • Replies: 6
    • Forum: Central Heating Forum
  17. troyg720

    Viessmann Vitodens 200 - No Installer Setup

    Hi, First time posting here - we're dealing with a Vitodens 200 that was installed back in 2004. The "INSTALLER SETUP" menu is missing and there's no fault shown, but the fault light comes on. The batteries on the programmer are good and the dip switches are set right (they haven't changed in...
  18. J

    Viessmann Vidotens 200w vibration noise

    Hi All, I had a Viessmann Vidotens 200w combi boiler installed recently and there is a vibration noise coming from the boiler for about 2 seconds if i turn on a hot water tap when central heating is on. The same noise can be heard a few seconds after a turn the tap back off. The pressure gauge...
  19. S

    Viessmann pump overun

    Hi, Looking for help with moving into my new house, I have 2 Viessmann boilers as a cascade system 200-w controlled by a 300-k panel and 200-H. It doesn't appear to be set up how I would expect, when calling for heat Id expect the valve to open and then the heating pump and boiler pump to start...
    • sammymeir
    • Thread
    • america pump usa viessmann
    • Replies: 4
    • Forum: USA
  20. eagleeye

    Viessmann capacitor missing

    Just been to one of our installers jobs because customer said boiler wouldn't go off when the heating was turned off on the Hive. It's a heat only 100 series boiler. So I turn on the heating on the Hive and boiler comes on but when turned of boiler keeps running. I take off hive receiver from...
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