Viessmann Limited Reviews

4.5 Rating 776 Reviews
87 %
of reviewers recommend Viessmann Limited
Based on 776 reviews
Shipping & Delivery
Delivery Methods
Own Driver, Courier
On-time Delivery
Accurate And Undamaged Orders
Greater than 93%
Customer Service
Communication Channels
Telephone, Live Chat, Email
Queries Resolved In
Under An Hour
Read Viessmann Limited Reviews

About Viessmann Limited:

The Viessmann Group is one of the leading international manufacturers of heating systems, industrial systems and refrigeration systems. Founded in 1917, Viessmann remains a family-owned business, however, now has over 12,000 employees across the world.

With 23 production divisions in 12 countries, subsidiaries and representations in 74 countries, and 120 sales offices around the world, Viessmann is an internationally orientated company.

Our commitment to the highest standards of manufacturing has led to our systems being awarded a multitude of awards over the course of our history. Recent award wins include the Red Dot Award: Product Design, the Trophée des Usines, the iF product design award, the Number 1 Trade Partner and Good Practice Energy Efficiency.

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01952 675000



Hortonwood 30, Telford, Shropshire

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The new update in the summer wasn't understood by viessmann engineers. It took months for the Eco mode to be introduced. Before that it was impossible to have water heating on anything but constant, which was extremely expensive. Now I use the Eco mode I have better control of costs. Viessmann sent an engineer who had no clue how to work the new software. 4 months later, the Eco mode appears on the app and problem solved. If not for the permanent 'on' issue, this boiler is simply outstanding.
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It’s been disappointing. Have only a one bed flat but the water in the kitchen isn’t always hot and neither is it in the shower or hand basin in the bathroom. In addition, a pipe beneath the boiler has continued to leak ever since installation.
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Hi Kim As Viessmann do not carry out the installations we would advise contacting your original installer to rectify any issues you are experiencing. Kind regards Viessmann
100W installed Jan 2015. Jan 2016 Motherboard failed. As you have few engineers in certain parts of the country it took a while for one to attend from quite a distance. Said there was nothing wrong as it did restart. Boiler failed again within 2 weeks. My usual engineer ascertained it was the Motherboard and told company . We had to insist it was the problem and it was replaced. Your 'local' engineer was useless and fitted work around his customers needs. Appalling service from the engineer and getting through to the company was dreadful. Problem took took over a week to resolve in very cold weather. The same problem has happened again - Feb 11th 2021. Indoor temp 10C! Better contact to the help line this time. Company technicians are good and assisted my engineer - electrodes was the initial thought. Replaced them. Still no boiler functioning- conclusion Motherboard again. Expense fault. Fortunately my engineer sorted it with your technicians in a day with the help of local plumbing suppliers stocking your parts! Warmth at last. How long for?
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Sorry to hear you have experienced these issues with your boiler. If you could provide your contact details including your postcode we can look into this for you and see what we can do to help. Please email details to Kind regards Viessmann
Boiler stopped working one day after installation. There was subsequently poor co-ordination between installation company and Viessmann, with each blaming each other. Two Viessman engineers inspected boiler, identified fault and provided replacement part but refused to install or fix. I was left without working boiler for nearly a week after installation. Issues like this should be handled behind closed doors - customers should not have to mediate between companies.
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Dear Graham Our records show that we attended the property in June to fix a wiring issue. If you have any further feedback regarding the situation described please send it to so it can be looked into. Many thanks Viessmann
New Boiler started off to flying start. Now second time without hot water. So frustrating! Filters fitted to H2O supply system drained flushed x4 times problem persists.
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Hi We are sorry to hear this. Please could you provide your full address and contact details so we can look into this for you? Many thanks Viessmann
Very disappointed in the overall fitting of my boiler. I bought the boiler to replace a 15+ year old boiler and after have the new one fitted I wished I stuck with the old. The mess left by the fitter; large crumbling hole in the kitchen wall (that my dad had to fill/plaster) is still crumbling onto my kitchen worktop, a myriad of pipes (that the old boiler never had) taking up large amounts of room in my already small kitchen, random pipe that is not attached to anything just left poking out of the kitchen work top and finally the noise it makes every so often is loud enough to be heard upstairs. For the considerably amount of money spent in the system I am sorely disappointed and local tradesmen who have been in and seen the result (plumber and electrician) are shocked at the quality of the work.
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i am looking to install a new combi boiler and am in the process of researching the various options. something i find worrying here is the corporate stock reply from veissman to poor reviews. clearly there's a problem with the control system being unfit for purpose but no solution is offered. just how many bad reviews does a company need to have before they take the appropriate action to fix the problem? these are clearly good efficient boilers but i'm not prepared to take the risk of having a control system i am unable to operate. has the control system been greatly simplified on the latest domestic models? furthermore, people are talking of a 10 year guarantee but, from what i have read, this seems to have been reduced to seven years in the uk. is this the case and if so why?
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Hi, Thank you for taking the time to write your review. The control system has been updated on the Vitodens 200-W and all other domestic gas boilers in our range comes with documentation on how to work the control system. Alternatively, there is information provided on our website if needed. The 10 year extended warranty is offered across our Vitodens 100-W and 200-W range as long as the boiler has been installed by a Viessmann trained installer. The Vitodens 050-W comes with a 7 year extended warranty unless the installer you have selected has contract support from ourselves and can therefore offer a 10 year extended warranty. I hope this information helps and if you need any further assistance, please do not hesitate to get back in contact. Kind Regards, Your Viessmann Team email:
Service was good but very inconvenient as you were unable to give a broad time of callout. This is very difficult when working full time. Engineer gave a time on the day but then turned up significantly later without contacting to advice. To be honest I’m a bit concerned with the quality of new equipment that had to be replaced within a few months of fit. It has been fine since though.
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Thank you for providing your feedback. I will pass your issues on to our Aftersales Department so this can be looked in to. We appreciate all comments as it greatly improves customer satisfaction. Best Regards, Viessmann
I had my new Viessmann Vitodens 100-W boiler fitted in August 2019 so it's still a bit to early to review the performance of the actual boiler. But I would like to give feedback on the handset control system Vitotrol 100. I think that it's far to complicated for a 'normal' person to operate and I've already had to have the heating engineer back to help me set up the heating programs and the explain again the overall day to day adjustments that I may require. He was here a long time as even he had issues with the programming. Why do you have to make these so complicated? I was advised by the engineer that Honeywell does an alternative controller that is a far more 'basic' controller that may suit my needs more! It's crazy that I've now spent +£3000 on a new boiler and that it's too complicated to operate and I may have to spend an extra £100 on a new controller to get the best out of my new boiler. If I'd know that the controls are so complicated before my purchase, I think that I would have bought a Glowworm boiler instead, whose controls are far more user friendly.
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Dear Stephen, Thank you for taking the time to provide your comments on the Viessmann controls and I am sorry for any inconvenience this has caused you. I will pass this information on to the relevant department so this can be looked in to. If you are still experiencing problems with your heating system, please contact our Technical Department who will be happy to assist you: Telephone: 01952 675 070 Email: Best Regards, Viessmann
Hi, i'm not sure if this is installation related or equipment related however we have had the boiler now since October 2018 and unfortunately it keeps losing pressure. Immediately after the installation the boiler was working perfectly fine, it has only been in the last 5 months that the boiler has been acting this way. We still have heating and hot water which isnt an issue however from my experience boilers are supposed to sit at approximately 1 Bar of pressure when it is either in use or not in use.
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Hi Thomas, We are sorry to hear that you boiler has been losing pressure. Have you contacted our Aftersales Department to assist you with this problem? If not, you can do so on the following contact details as they are best equipped to help: Telephone: 01952 675060 Email: Kind Regards, Viessmann
Boiler has not worked right since it was installed and is still not working right
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Hi Ian, Sorry to hear you are experiencing problems with your boiler. To get this problem fixed as quickly and efficiently as possible. Please contact our Aftersales Department on the details below: Telephone: 01952 675060 Email: Kind Regards, Viessmann.
I was dissappointed to receive a 7 year warranty certificate with no detail of what is covered and no contact details if anything goes wrong. I would very much like more information about the warranty.
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Hi Coral, You should have also received an email containing the warranty T&C's. Maybe they went into your SPAM folder? If this is not the case, please let us know, we will happily send them to you again. Regards, Viessmann
Poor,due to having to call heating engineer out twice. You would never expect two breakdowns in as many months this was the coldest time of year,thank god for electric fires.
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Hi John, We are sorry to hear that your boiler has broken down and for any inconvenience this has caused you. Can you please email your details to so we can help get your boiler up and running? Kind Regards, Viessmann
I Have been without hot water since the weekend, contacted customer service numerous times as my boiler is under warranty. Each time I call they claim that my boiler is not registered to my address or registered at all even though my installer has sent this off when it was installed in 2013. I have been sent a screenshot of a confirmation notice that he has had to go through and 're register it but still they have nothing there side. Customer service has a lot to be desired
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I had a viessmann 100 installed 2year ago was ok for awhile then nothing went right with it BUT trouble renew burner then something else ,water went hot /cold thenHOT, Hot new heat exchanger ok again for awhile then again TROUBLE called in viessmann enginer told me what was wrong the return/flow rubber hoses was breaking up inside blocking up the heat exchanger .He then phoned viessmann about this ,they said it was not the fault Now he is a heating so he would know better well awhile i got new hoses as agood will but I had to pay to have them fitted but the boiler is still not right the person in your service dept told me to power flush it I had this done not long ago also had a adey . Magaclean filter fitted l am fed up with the whole thing .its still under warannty l wish l did not buy it
Helpful Report
Hi Robert, Thank you for taking the time to leave a review. We are really sorry to hear of the troubles you have had with your heating system. During the previous support visits we have made to your property, it has been identified that the issues encountered have been caused by installation/system issues, not a faulty Vitodens 100-W Gas Boiler. We recommend you make contact with the installers of your heating system who should be able to assist you further. Best Regards, Viessmann Limited
After about a month of my new boiler being installed there was no hot water and the day later there was no heating. The company that installed it sent out someone that night to see if it could be fixed. The weather was very cold and they didn't want me to be without heating and hot water. The engineer couldn't fix it. They contacted Veissman who said no-one could come to me till after the weekend, leaving me a week without heating or hot water. The engineer came from Glasgow just to fix my boiler, instead of someone a few miles away from Aberdeen, which he wasn't very happy with, and I didn't think was efficient. He did a good job and diagnosed that the fan had died. Does this mean it was an old fan? I was happy to pay what I did for the boiler but not one that is faulty! Hopefully the boiler will continue to work especially as it is the middle of winter and I have been well and really don't want to be in the situation of having no heating and hot water again anytime soon! The boiler has been working fine since the replacement, thank you.
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Unfortunately the only instructions for setting the timer are written in German so I have not been able to use this. I had no response to email I sent asking for help with this.
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New boiler making a bad noise so installer had to replace the heat exchanger which you supplied.
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Very good very good
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Hot water is not constant especially in the bathroom. You're engineers said it was ok. Hot water shouldn't be cold
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Viessmann Limited is rated 4.46 based on 776 reviews