Vaillant UK Reviews 

Engineer on time very friendly polite and helpful, carried out the work in a very professional and clean manner.

Service & repair of Vaillant Arotherm Plus. The young gentleman Vaillant sent (820 Fred) was highly knowledgeable and explained the process as he went along (there actually wasn't much wrong with the machine in the end). A very satisfactory 5-star experience; result being that the original installers are not the ones we’re going to use for servicing in the future, but rather stay with Vaillant direct. Many thanks!

The heating engineer replaced a faulty part causing a leak in the boiler. It was a long job in sweltering hot temperatures but he stayed to finish it.

#567
Very happy with the service provided by the engineer #567 he was very nice and polite. Fast and efficient service. Highly recommended, thank you 😊

Both men were friendly and whilst working diligently were able to give explanations when I asked.

Quick and efficient Steve (521) was prompt, polite, precise and very neat and tidy. A real gent

24th June 2026:
Built-in planned obsolescence could not be more evident after my Protec 28 Pro model broke down literally weeks before my 7 year guarantee expires. Fault codes 28 followed by 29, ignition fault -despite power, pressure and gas supply to thr boiler being present. This does not inspire much confidence in Vaillant and destroys what little trust that still remained with the company. Regardless, my request to have the boiler repaired was met with frustration. Apparently it was not registered. If this was true, how did the company know so much about me, my personal details, address, phone number, boiler model and when it was installed when I called them. I never provided that information. After checking my chat with my gas engineer, it turned out he registered my boiler with Vaillant and this was confirmed in the chat as well as by the fact that Vaillant had all my boiler details. So stage 2 of their attempt to excuse themselves from their guarantee obligations: They said my engineer needed to do it through their My Rewards process using a Vaillant app. This was not a requirement according to their website which clearly stated to qualify for 7 years guarantee, it simply needed to be fitted by a CORGI registered engineer. Excuse after excuse. This was the third Vaillant boiler to breakdown with me. I am a landlord and have then at my properties including at my own house. I am now considering litigation. All future boilers will now be replaced by Worcester Bosch after this experience. Watch this space as I hope to report back on the results of my litigation.

Update: 2nd July 2026:
Vaillant have responded to my review as you can see below. However, their response is disingenuous. I HAD already emailed them but got no response. It is clear to me then, that they only reply to appear to the public that they care, when this could not be further from the truth.

Also, I had to call out my own engineer who charged me £100 to replace an ignition part. This is such a small cost for Vaillant to be destroying their reputation over. Vaillant had engineers in the area and could so easily have remedied this but they chose not to. As a matter of principle, I will still be continuing with my litigation and will report here, on its progress and outcome.

Fast and courteous service

Ryan - Engineer No 260 did an excellent job. He ran up and down stairs in boiling hot weather making sure he left nothing unchecked. He even managed to check the flue which is in a very awkward part of the roof. He was clearly a perfectionist, but at the same time very pleasant and polite. He was also very patient with my extremely yappy dog! Would highly recommend.

#412 all good very happy engineer was brilliant

Our Vaillant AroSTOR has broken after only 3 years and will need to be replaced. The boiler failed after a local power outage. Our heating engineer tried to fix it but couldn't. After 3 weeks of no hot water, it took a Vaillant engineer to come and set it to immersion mode to at least give us hot water again. The one star is for the engineer's service. He told me the compressor had jammed. It took a further month for a report with that information to get to our local heating engineer and I've now been told that the part is obsolete and cannot be replaced and is only covered by two years warranty anyway. I've been advised that a whole new replacement cylinder is required at our own personal cost. Vaillant, I can't tell you how disappointing this is...I expect a hot water cylinder to last longer than three years!!!

The Vaillant service engineer Tom called and right from the start he was polite and extremely through servicing my Ecotech 28 the first time that this had been done properly for several years.

He replaced gaskets and a temperature sensor then ran it up and took emission readings nothing was too much trouble.

I had availed myself of this excellent service to my Ecotech 28 through taking out insurance again with Domestic and General

In all an excellent Customer Service on one of the very best boilers available

I am in Chelmsford Essex

We’ve used Vaillant Engineers for many years to service and repair our boiler.
Another excellent service today great communication from the engineer he turned up on time and resolved a couple of minor issues during routine service. Our engineer A717 today was pleasant, helpful and efficient Top Marks !!

Undertook training on the new arotherm pro and plus range of air source heat pumps.
These things are GREAT! And the training was brilliant.
The trainer pitched the training very well for the room so everyone could understand and learn no-matter what their knowledge levels.
Shout out to Toby Collis for a brilliant session.

#508. Very helpful service today. Looked at everything and had a good attention to detail. Went out of his way to assist further. Appreciate all your help!

The engineer (number 260) - very friendly and got straight to the problem, explained everything, replaced affected parts, and made sure everything worked afterwards. Thank you!

Professional;friendly;the engineer was knowledgable

Stuart 537
Very happy with vaillant engineer very knowledgeable
On boiler and very pleasant
Thankyou 10 out of 10.p

Had a Vaillant tech come out to look at an issue with cooling, and Fred was exceptional, full of good information and helped me get a grip of a new ashp system. Great service.

Engineer rang before he arrived, identified the issue, which required a pump replacement, the original pump was obsolete, so he sourced a replacement, which was difficult to fit due kitchen housing and electrics, kept me informed as he progressed and was very pleasant
What more can you ask for ?
I have used Vaillant for many years and they always deliver