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
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Review summary
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What people talk about most
Reviews shaping this summary
Really excellent service from vaillant. Our 15+ year boiler developed a problem. A different company advised that it needed to be replaced and quoted £4,871 to replace! The vaillant engineer quickly d... See more
Company replied
Fantastic service Tom #538 on our Vaillant annual boiler check. Kept Upto date with everything from start to finish text us the night before, messaged us 30 mins before arriving, Tom fully explaine... See more
Company replied
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 o... See more
Company replied
Company details
- #88 of 117 best companies in Heating service
- #7 of 12 best companies in Boiler Manufacturer
- #37 of 52 best companies in Boiler supplier
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
4.6
Excellent
23k reviews
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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
Professional service the company was…
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 before!
My mum had a local plumbing company out previously that wanted to condem her boiler so he could sell her a new one!
It definitely pays to use a professional company. Also the staff in the office were really helpful and nice to talk to.
Gold stars all round. Thankyou x
28 June 2026
Unprompted review
Reply from Vaillant UK
We are so pleased to hear about your positive experience with us. It is wonderful to know our engineer was respectful, polite, and punctual, and that your mum's boiler is now working perfectly. Thank you for your kind review.
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 courteous and professional
Very courteous and professional and did a good job. He explained everything he’d done and pointed out things to look out for, should anything happen.
26 June 2026
Unprompted review
Reply from Vaillant UK
Thank you for your review. We're happy to hear that our engineer was courteous and professional, and clearly explained everything, including what to look out for in the future.
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
Vaillant Boiler Service
Leo - engineer ref 213 - was brilliant. Great manner and very knowledgeable, a pleasure to deal with he is a credit to Vaillant, Thank you Leo !
26 June 2026
Unprompted review
Reply from Vaillant UK
We are so happy to hear about your positive experience with our engineer. We truly appreciate you taking the time to share your kind words.
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
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
Reply from Vaillant UK
Thank you for your review. We'll be sure to pass this on to Andy and his managers!
Best regards,
Vaillant
Reply from Vaillant UK
Thank you for the positive review. We're pleased you received great service and will pass your comments over to the engineer.
Best regards,
Vaillant
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