Nick (Engineer number 829) did a fantastic job when he came out to fix an issue with my heat pump. He was friendly, extremely thorough, and took the time to explain everything he was doing so I felt... See more
Company replied
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Review summary
Created with AI, based on recent reviews
What people talk about most
Reviews shaping this summary
Engineer arrived very early on time Very professional engineer who has done a very good job after replacing the fan and G10 gasket We love your Valiant service plan and recommend it to all as its... See more
Company replied
Engineer Lee arrived within 24 hours of my phone call to get my Vaillant air source boiler (temperature sensor) repaired so I had hot water again. He was friendly, cheerful and efficient. He patiently... See more
Professional service the company was quick to send an engineer that was respectful polite and arrived on time he repaired my mums boiler it’s now working perfectly infact she said better than befo... See more
Company replied
Company details
Written by the company
With a proud tradition in the UK, Vaillant are a household name because of exemplary products and service. Vaillant operates with the ultimate aim of delivering greater warmth and comfort to your home.
Vaillant UK
Written by the company
- Comfort for your Home
- With a proud tradition in the UK, Vaillant are a household name because of exemplary products and service. Vaillant operates with the ultimate aim of delivering greater warmth and comfort to your home.
- A History of Excellence
- Vaillant are one of Europe’s leading heat technology manufacturers and innovators. Incorporating the finest German engineering with UK manufacturing for enhanced performance, quality and reliability.
- Smart Boilers
- Innovating and developing the latest technology such as vSMART, Vaillant boilers can be operated via your smart phone to achieve a perfect temperature wherever you are.
- Quiet Mark Accredited
- Vaillant is proud of the fact that our domestic boilers and renewable heat pump products have all been independently verified and judged to be one of the quietest products of their kind on the market, meaning our products not only perform to the highest standard but are as equally environmentally friendly.
Contact info
Nottingham Road, DE56 1JT, Belper, United Kingdom
- customercare@vaillant.com
- www.vaillant.co.uk
4.5
Excellent
23K reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
At Trustpilot, it's all about human content. This business can also access our AI-assisted response tool which helps them draft replies.
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Outstanding service from Leo Engineer…
Outstanding service from Leo Engineer 213 5 star ⭐️ service. He’s a star
3 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we are so pleased to hear about your positive experience with our engineer. We are proud of our team and appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Truly dreadful service.
Truly dreadful service. My plumber identified a leak in my hot water tank (1 year old Unistore 300) on the 22nd of June. A Vaillant engineer was out the next day, but gave the impression he hadn't seen many of this type of tank, spent a lot of time on the phone, and left after misdiagnosing the leak as an installation issue. The installers have been out twice since and confirmed that the leak is not external to the tank. A second (much better) Vaillant engineer came out on the 1st of July and confirmed that the tank was leaking and would be replaced under warranty. Since then I have been trapped in call centre purgatory, unable to get a straight answer to the apparently simple question: When will you replace the tank? The people in the service centre can't even tell me when they'll be able to answer the question, let alone actually fix the problem. Meanwhile I'm stuck here with no hot water for the foreseeable future.
23 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we’re sorry to hear about your experience. Thank you for providing your reference number so we could look into this with our Customer Care Team, the team has advised that they have already fully investigated this and been in touch with you directly, please refer to the correspondence from customercare@groupservice.co.uk for further information.
We apologise for any inconvenience caused with this.
Kind regards, Vaillant
Efficient and friendly engineer
Efficient and friendly engineer. No time wasted, came did the job and left my house as he found it. The engineers #508
3 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we are so pleased to hear about your positive experience with our engineer. We are proud of our team and appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Repair and service
Our engineer was tom 710
He was polite explaining what he had done and what needs doing
He cleaned up afterwards
Good service
Thank you
3 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your 5* review. We're happy to hear that the engineer explained the service clearly.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Absolutely fantastic experience
Absolutely fantastic experience, brilliant advice from Tom.
2 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review and for taking the time to provide us with your feedback. Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Booked yesterday aerviced boiler today
Booked yesterday serviced boiler today! Excellent polite professional service!
2 July 2026
Unprompted review
Reply from Vaillant UK
We are so pleased to hear about your excellent experience with our service and prompt scheduling. We appreciate your kind words!
Kind regards, Vaillant
Just like a circle,true to it's…
Just like a circle,true to it's centre,a promise made and a promise kept.The service i received was first class from start to end.All layers of communication and personnel were simply exemplary.Engineer 822 was the final icing on the cake.
2 July 2026
Unprompted review
Reply from Vaillant UK
We are absolutely delighted to hear about your first-class experience and that our team provided such exemplary service from beginning to end. Thank you for your wonderful 5-star review!
Kind regards, Vaillant
Ben (#151) was very quick and helpful
2 July 2026
Unprompted review
Reply from Vaillant UK
We're so glad to hear about your positive experience with our team member! We appreciate you sharing your feedback and will be sure to pass this onto Ben and his managers.
Kind regards, Vaillant
Andy visited to sort out an issue with…
Andy visited to sort out an issue with our air source heat pump cylinder. He diagnosed and sorted the problem whilst explaining everything to us in a clear, easy to understand manner.
Andy was prompt, polite and professional. Would highly recommend!
2 July 2026
Unprompted review
Reply from Vaillant UK
We're delighted to hear about your positive experience with our engineer. It's wonderful to know that the issue was resolved clearly and professionally. Thank you for sharing your feedback.
Kind regards, Vaillant
Valliant ecotech plus 618 fitted 2022
Valliant ecotech plus 618 fitted 2022. After fitting the boiler we experienced regular and increasing loss of pressure, resulting in the boiler shutting down. We were advised to manually refill the system. When this started happening every week or so we called the Valliant engineer under the warranty. He told us the boiler was not the cause of the problem and that there must be a leak in the heating pipes. After paying £670 for a specialist leak service, it was determined there was no leak in the heating pipes and the boiler was responsible for the pressure loss. A different engineer attended from Valliant and appears to have fixed the boiler having replaced parts. When we raised a complaint regarding the unnecessary expense of the specialist leak service with Valliant they said we caused the pressure loss by overfilling the system when it lost pressure and declined any compensation. Furthermore there is no alternative dispute resolution service for Valliant and escalation of a complaint to the CEO or MD results in the complaint being returned to the customer care team.
19 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we’re sorry to hear about your experience. Thank you for providing further information so we could look into this with our Customer Care Team, the team has advised that they have already fully investigated this and been in touch with you directly, please refer to the correspondence from customercare@groupservice.co.uk for further information.
We apologise for any inconvenience caused with this.
Kind regards, Vaillant
Great experience
Engineer turned up in a very professional manner, was very helpful and skilled, can only recommend.
1 July 2026
Unprompted review
Reply from Vaillant UK
We're delighted to hear about your positive experience with our engineer. We appreciate you highlighting their professionalism, helpfulness, and skill. Thank you for the recommendation.
Kind regards, Vaillant
Nick the Vaillant ASHP engineer
Nick the Vaillant engineer arrived on time to service my ASHP. He was friendly, courteous, knowledgeable and helpful.
1 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review. We are so pleased to hear about your positive experience with our engineer. We appreciate you taking the time to share your feedback.
Kind regards, Vaillant
Left a 90-year-old vulnerable person…
Left a 90-year-old vulnerable person with no heat. Shocking negligence.
Unbelievably poor service and a total lack of empathy. Our boiler broke down (F.20 error), and after initially agreeing a same-day call-out over the phone, they called back stating since the boiler is situated in the loft, the next available appointment is in two days. I explicitly explained that we have a vulnerable 90-year-old occupant in the home, but they completely refused to expedite the call-out.
To make matters worse, they informed me they don't even have a vulnerability or escalation team to deal with high-risk situations. It is terrifying that a major heating provider has zero protocols in place to protect the elderly. I've had to pay for a private local engineer to come fix it instead. Vaillant's customer service is a bureaucratic wall that doesn't care about the safety of its customers. Absolute disgrace.
Happy to provide account details for verification to management should this review actually be picked up, but I highly doubt it considering my experience this morning.
1 July 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we’re sorry to hear about your experience. Thank you for providing further information so we could look into this with our Customer Care Team, the team has advised that they have already fully investigated this and been in touch with you directly over the phone on 1st July to discuss the above mentioned points.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
We apologise for any inconvenience caused with this.
Kind regards, Vaillant
SERVICE WITH A SMILE 😃
I had a engineer come out from vaillant to give my boiler it's annual service on the 29th June.
His name is Sam and his No is #508
From start to finish he was very pleasant to talk to.
As my boiler is in the loft anyone would find that it could be very warm up there during summer. I positioned a couple of fans in the area he was working to relieve him of the rising heat,I also had the Velux window open. Customers should be aware of the heat that a loft can hold, and be mindful of the harm it could inflict on any person doing jobs in that area.
Overall a job well done by Sam.
Regards
Malcolm D
29 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we are so pleased to hear about your positive experience with our engineer. We are proud of our team and appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
This was my first service with Vaillant…
This was my first service with Vaillant and I was really impressed. The engineer, Matthew #566 phoned 20 minutes before he arrived which is helpful and when he arrived was polite, friendly and efficient. I have no hesitation in booking my next service with them.
30 June 2026
Unprompted review
Reply from Vaillant UK
We are so pleased to hear about your experience with our engineer. We appreciate you sharing your positive feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Nick 829 was a very lovely man he…
Nick 829 was a very lovely man he phoned me and confirmed exactly what time he was arriving. And he did a brilliant job fixing our problem and he explained everything he was doing .Just brilliant
30 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we are so pleased to hear about your positive experience with our engineer. We are proud of our team and appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
#412 great happy service engineer
#412 great happy service engineer. Very helpful
30 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review, we are so pleased to hear about your positive experience with our engineer. We are proud of our team and appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
very prompt good clean polite
very prompt good clean polite
proper use of PPE fully explained what they done and what needed to be done
29 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your 5* review. We are so pleased to hear that our engineer was prompt, clean, and polite, and that everything was clearly explained to you.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
The engineer that was sent to us (#711)…
The engineer that was sent to us (#711) was excellent. Professional, friendly and discovered the problem really quickly. He has restored my faith in Vaillant and heat pump technology and deserves a raise.
29 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review. We are so pleased to hear about your positive experience with our engineer and that they quickly discovered the problem. We appreciate you taking the time to share your feedback.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
Great professional service
Great professional service. #338-Karl was brilliant
29 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for taking the time to share your positive feedback, we appreciate you letting us know about your experience with our engineer.
Should you need to contact us in the future, all our contact details can be found here: https://www.vaillant.co.uk/contact/contact/
Kind regards, Vaillant
The Trustpilot Experience
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.