Vaillant UK Reviews 22,247

All the engineers that called to repair a complex breakdown were professional, friendly and could not do enough for us even when the replacement part failed through no fault of theirs they went the ex... See more

We used the one off boiler repair service and it was excellent! An engineer came out as arranged and then we had to have a second visit but that’s fine and now everything is working perfectly. The fau... See more

Amazing all round service by Mark (109). Mark phoned the morning of the appointment to give me his ETA, he arrived and found the fault (from the installer, not Vaillant) and put it right straig... See more

The engineer arrived promptly after telephoning me to advise of his eta. He was polite and professional and explained what the problem with the boiler was. He fitted the new part that was needed an... See more

Repair engineer Gary was very polite and diagnosed the issue on my new boiler with ease and explained his findings in non technical layman language - much appreciated. Repair and checks were completed... See more

After 5 visits from sure serve we finally got Vaillant out to fix our boiler. Mark (109) turned and diagnosed and fixed it within a couple of hours. Really polite and communicated with us re probl... See more

Our engineer (#617) travelled an 8 hour round trip in horrendous weather to get our heating up and running after a power outage. He updated me on the way of his ETA. Arrived promptly and despite the a... See more

We lost water pressure so I called Vaillant who sent engineer Mark (109) . Mark was excellent. He notified me beforehand when he would be arriving and was on time. He was extremely thorough and gave m... See more

First class service from Vaillant engineer #508 this morning. Very quickly identified the problem and promptly fixed it but also took the time to explain how to get the best out of our air source heat... See more

#146 Richard, was kind, courteous and professional, listened to my issues. Richard then carried out a full inspection of the entire system and rectified any issues present, richard then took th... See more

We called out #247 engineer for a boiler maintenance and gas leak check. He was fast, efficient, knowledgeable and friendly. All tested fine and was very reassuring. Second time he fixed our thermosta... See more

Had a very smooth boiler check carried out by Mark, a very polite gentleman (#567). The whole process took around 45 minutes, he taught me some basic things and answered my doubts.

Devon (252) was brilliant. Really knew his stuff and fixed our boiler in no time. Considering we had been quoted £900 as starters to replace a valve that didn’t need replacing, I’m exceptionally pleas... See more

The fixed price repair was really good value for money. The engineer was so knowledgeable and diagnosed the issue within 2 minutes, plus found lots of other faults. Was polite, respectful and very... See more

We have a disabled member of the family and it is critical we have access to hot water and heating for the home. Karl went above and beyond to fix our boiler. It was a very tricky job but he completed... See more

Engineer #511 (Kevin) called to service our boiler. The entire service from start to finish was exemplary. From the arrangement of the appointment to being informed of the am/pm visit. Then Kevin... See more

I asked Vaillant for a "one-off repair" to fix a long-standing problem with our boiler which the local company which installed it had been unable to solve. It took three visits by their engineer, Stua... See more

Really polite and friendly engineer, arrived on time after calling ahead to say when he'd be arriving. No mess left behind and clearly explained what he was going to to in order to fix the boiler. Gre... See more

Can’t fault the annual service. First time of using after original fitter normally doing the annual work. Valiant fitter arrived promptly, was courteous, got on with the work and fitted a few parts as... See more

Devon, (engineer no. 252), was kind, considerate, friendly, and professional. He was very clear when explaining issues and made sure I understood everything before he left, including giving me lots of... See more

The engineer (Gareth) - was superb in diagnosing faults on our boiler very quickly. He was very professional and clearly extremely competent and highly trained on the product type. The contact from th... See more

Ryan (226) was excellent today ,very helpful, knowledgeable, and polite. He gave great advice and ensured the boiler was in good working order. Engineers like Ryan are a real asset to Vaillant. Ple... See more

Communication. From my first phone call to ask for engineer visit as had a small Wty issue, to end of the job. Engineer arrived, (#265) very polite and conscientious, clean and tidy working.

Danny, engineer No 519 was very efficient in solving the problem, clean worker, very friendly and explained the problem in hand. Arrived on time as stated. Cannot fault the service from Vaillant. Than... See more

Quick response. Good communication. Alex the engineer #502 was polite, removed his footwear on entering our home. Boiler was repaired quickly and Alex explained what the problem had been.

Gyln was great, slight issue with the boiler came in got it sorted quickly and gave great explanation of the fault and works carried out to repair (fingers crossed all good now!!)

Had issues with an air heat pump. Engineer came same day and re gassed the device. Nick 829 was fantastic, very helpful and explained everything. Could not be happier with the service.

Mike (Engineer #161) has come to my property over the years for annual services and he came over this afternoon to repair an issue found with the annual service. He's always very friendly, professiona... See more

I called the technical helpline regarding a fault with a Glowworm Flexicom. Mark answered the phone and was a real help. He obviously has buckets of experience. *****

knowledgeable and friendly engineer arrived on time, diagnosed the fault with my boiler quickly and had my heating and hot water back in no time at all. great service.

Engineers 171 & 265 were extremely professional, efficient and tidy when they carried out our boiler service. We’d love it if they could come again next year!

Rapid response, turned up ontime, quickly fitted the new MyVaillant EBus system with sensoROOM thermostat. #505 Installer was enthusiastic, enjoyed his work, seem on the cutting edge of technology.Ver... See more

Becs has always done a great job and consistently left us with confidence in her capability and attentiveness. We would always choose to have her service our boiler.

Very prompt service from glow worm. 36 hrs from raising the issue to being resolved. The engineer, 719, knew the issue and resolved it speedily, followed by all the gas safe checks.

Dennis 253 was very experienced & exceptional in the job he’s provided today. Was extremely impressed with the work carried by Dennis is an asset to this company highly recommend anyone to use Vaillan... See more

Leo 213 is the best engineer! Friendly, fast, fastidious and fuss-free in his professionalism. Boiler serviced and missing Inhibitor added, all done in good time. Top marks.

The service engineer #538 went above and beyond. He resolved the problem we had getting our heating to work, he was so friendly and personable. Would definitely recommend

I needed advice regarding a problem I have been experiencing between a new Thermostat and an old Valliant boiler that is being replaced in the spring. I called the Valliant Technical Help Desk with n... See more

Amazing service came out same day. Nicky was superb and let me know the issue after running all the tests. Got the boiler back up and running in no time.

My service engineer identified an issue under warranty . He rang Vaillant and they came within 3 hours. Matt the engineer 719 was polite and very good at sorting the issue

I had a problem with the boiler which is under guarantee and contacted their service department. I spoke to a very helpful customer service lady who quickly managed my problem and immediately booked a... See more

#538 rang before attending and came on time. Very knowledgeable and fixed the problem professionally. Very friendly amicable young man!

Engineer arrived on time. He was informative as to the problem with the boiler. He was able repair the boiler, checking it was working well.

Recently , I had a boiler replacement with a very knowledgeable gas engineer (GeorgeSpasov), who did explained every step of the process . He did a wonderful job from the specialist recommendations t... See more

Excellent service and job repair by Neil (201). Really very helpful and fixed the problem promptly

Karl #338 was extremely knowledgeable and friendly and diagnosed the issue right away. We had a good chat and Karl is a top man. Good luck with the marriage

Andy 533 the engineer who came today on the 6th Oct 2025 was excellent. Dealing with a difficult boiler and solar Thermal repair and fault finding after previously unsuccessful work carried out by pr... See more

Karl (338) was absolutely fantastic. Worked hard and explained everything really well.

The engineer was extremely helpful and was competent in the work that he carried out. His no is 306

Had no heating for four days Nick came over and fix the first problem, but also found another problem and fixed as well Nick 829