Viessmann Climate Solutions UK Reviews 

We had no heating after a separate engineer came out to service our boiler. Called viessmann and Irfaan came out the next day. He quickly identified the broken part, replaced it gave the boiler a service and was a thoroughly top guy. Thanks Irfaan

Very pleased and happy with new Boiler from Viessmann.

I reported an issue with my boiler 15:00 on a Friday afternoon. On Monday morning at 09:30 Irfaan was already standing in front on the boiler. He fixed the issue relatively quickly without any fuss. He was very knowledgable and polite.

The engineer Irfaan was very professional, knew his stuff and was very quick completing the repair. The whole process from booking the call through to completion was vet good.

Was recommended to replace an existing boiler with a Viessman. Was installed and working in a day. Boiler is so quiet. Heating and hot water lovely and hot. Good value when considering all the options, as it required limited changes to existing systems. Highly recommend.

Our Vitodens 100W boiler kept losing pressure - down to zero on the analogue gauge, 1.1 bar according to the digital sensor - despite repeated refilling to around 1.8 bar. However, we could see no obvious evidence of a leak from any radiator.
On visiting, Viessman engineer Irfaan listened attentively to the story and then swiftly determined the cause of the problem. He replaced the faulty pressure relief valve, recharged the air pressure in the expansion vessel and explained how these issues had caused our problem. (He also replaced the faulty analogue gauge whilst highlighting that it is inherently unreliable; the digital pressure sensor should be used instead.) Finally, he gave some clear advice about how to avoid problems in future.
What a total star of a Viessmann engineer! This is what excellent service looks like! A million thanks Irfaan!
(Unfortunately, over the few days after Irfaan's visit, it became apparent that our boiler was STILL unable to maintain pressure. It turned out that, in addition to the problems with the boiler itself, but completely unrelated to them, there was a slow leak from under a ground floor radiator! Once that was also fixed, we had no further boiler-pressure issues.)

Fast and efficient call out, eight years into a ten year guarantee and no quibbles. Excellent Company to deal with. Many thanks for the quick response.

The engineers from Wessex gas were excellent left everything clean and tidy, explained the use of the controls well and clearly and I would be happy to recommend them. It’s only been a week since the unit was fitted but so far it’s delivered as expected

Craig Spiller our Viessmann engineer was brilliant solved the problem too man

Viesmann customer service very efficient
Got us booked with an engineer within 2days
Brilliant service from Craig who came and fixed the problem who was very polite and helpful

From booking to completion everything was handled with efficiency, friendly communication and easily understood information and advice - which to a ‘non technical oldie’ is very important ! …….. installation of the conversion to a combi boiler from an antiquated system by the gas engineers, was carried out with precision,professionalism,good humour and efficiency- with everything left neat and tidy!

Excellent service, once part arrived, booked for fitment following day, engineer quickly installed, left everything clean and tidy,no issues 👏

Everything and everyone a brilliant job from start finish a big thank you to Chris, Craig and Paul and Rebecca all at Hug Boilers!! I would recommend this firm to anyone wanting a new boiler brilliant service!

I noticed a leak coming from my boiler and within 2 working days, Veissmann sent their fantastic engineer Irfaan to rectify the issue. From start to finish Irfaan was polite, thorough and got the job done. He explained what the issue was, answered any questions I had and left the area clean and tidy. I cannot recommend this brand enough.

An excellent experience from start to finish.A Viessmann approved installer fitted the boiler,extremely satisfied with the service.The vitodens 100 is so quiet you dont even know its on.The accompanying app is so user friendly and easy to use,and the installation company were so helpful and talked me through everything.I wouldn’t hesitate to recommend viessmann,excellent all round.

My boiler broke down on 14/2/26 in the morning so I called Viessman and spoke to a customer service lady called Amy, she was very helpful and got me booked in for a repair on Tuesday 17/2/26. The engineer who was called Vincent was excellent he repaired the fault but also replaced other parts to help it work more efficiently taking his time to make sure everything worked properly.Great Job!
Thank you very much Mr Powell

very quiet machine, adequate for 5 bed room and two baths, works perfectly with Nest

As a Viessmann costume for 5+ years i have not had a problem. But this year i had a little problem, i called Viessmann costumer service what a wonderful team within 48hrs i had my engineer came out to me. Irfaan your my hero no matter what..! Your service, help & problem solving was incredibly fast. He was on the phone to ordered/find the parts while he was still in my house, the parts arrived to my house within 24hrs. As a cancer patient i can’t thank you enough 🥹 I truly appreciate all your hard work and effort you put into to help me may your pathway be bright and clear god bless you.!
Highly recommend Viessmann to everyone

I bought a Viessmann Vitodens 100-W 16kW Heat Only condensing gas boiler in February 2025 and I’m really pleased with it. It integrates perfectly with my existing central heating system which has a really good 'Heat Store', from Newark Cylinders, at the heart of it. This boiler works perfectly and has cut my gas bill nicely.

Prior to the purchase I did some research and chose this Viessmann product for the following reasons – consistent good customer satisfaction reviews from the 'Which' site, a stainless steel heat exchanger for long life, German design and manufacturing quality and also a 12 year warranty - when installed and registered within 30 days of purchase by a Viessmann trained and experienced installer.

I could have shopped around the Plumbers Merchants for the best price for this boiler and then got my pub mate, who is a plumber/gas installer to fit it at a ‘Mate’s Rate’, but I chose not to as I really wanted the 12 year warranty for my peace of mind. Please note the terms and conditions of this warranty as they are very important and must be followed to maintain the full warranty period.

There was however a problem as the installation engineer was NOT familiar with this boiler (perhaps he missed the Viessmann Training) and just removing the front panel proved to be a challenge to him. After a lot of head scratching and phone calls to a colleague he managed to get the boiler going. All was well for almost a year and then I got another Viessmann ‘trained and experienced’ engineer in to perform the annual service which is required to maintain the warranty. This guy was fully familiar with the boiler and quickly and efficiently carried out the service but when the boiler was switched on a warning light came on. He took the cover back off and quickly diagnosed the problem – electrical contacts to the gas valve were damaged. I asked if he thought it had come out of the factory like that or been damaged by the installer and he said that it would be hard to say but the part would need replacing (gas valve and fan assembly).

When I called Viesssmann to book a warranty visit/repair a young lady told me that if it was determined that it was not a manufacturing fault I would have to pay £150, which I wasn’t too pleased about, to put it mildly, because as a customer I was not to blame in any way. Fortunately when the Viessmann engineer arrived two days later he was really friendly and he quickly replaced the part with no quibble whatsoever.

All in all I am still very pleased with my purchase (I will stay with the experienced engineer for future servicing).