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Rated 1 out of 5 stars

I contacted Vaillant in February for a service and to say I had a leaking boiler. They said I should have had a service in January and so my warranty was invalidated. The sum of £160 was required to r... See more

Rated 1 out of 5 stars

One of the worst company I ever dealt with. 1. Repair time 28 days. 2. 3 visits from their unprofessional ill-mannered engineers. 3. Massive communication gap within the company. 4. Not regu... See more

Company replied

Rated 1 out of 5 stars

Do not ever use Vaillant- if anything needed there is no online booking (CRM) - only a telephone number that you will never get through to. New boiler installed - not functioning as unable to get thro... See more

Rated 1 out of 5 stars

DO NOT TRUST/ BUY VAILLANT COMBI BOILERS ECOTEC PLUS. Boiler ELECTRICS failed to START after 3 months and vaillant have purposely made every fake excuse only to want to charge £180 to attend and ma... See more

Company details

  1. Boiler and Heating Service

About Vaillant GmbH

Written by the company

You are on the corporate page of the heating manufacturer Vaillant on Trustpilot.

To view customers’ opinions on Vaillant’s individual national companies or to review Vaillant services in your country, please use the country specific Vaillant Trustpilot page.

We also like to help you via our website http://vaillant.com

Contact info

1.4

Bad

TrustScore 1.5 out of 5

180 reviews

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Hasn’t replied to negative reviews

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Rated 1 out of 5 stars

Yes more poor communication by Valliant

I contacted Vaillant in February for a service and to say I had a leaking boiler. They said I should have had a service in January and so my warranty was invalidated. The sum of £160 was required to retain the warranty. I was told they don’t send reminders about servicing. This week I received an important reminder to get my boiler serviced. They must benefit when services reminders are sent late. I decided I would have better treatment if I used a local plumber. The leak was due to a failed diverter installed 3 years ago by Valliant. The plumber contacted Valliant to say it was only 3 years old but Valliant weren’t interested.

February 19, 2026
Unprompted review
Rated 1 out of 5 stars

Your service provider in Turkey is rubbish.

Your Turkish distributor and service provider is a complete disaster when it comes to customer satisfaction. It is unprofessional and based entirely on greed. I definitely cannot get a quality service. Even for products under warranty, they charge you for the service. Your distributor is completely destroying the brand value.

February 9, 2026
Unprompted review
Rated 3 out of 5 stars

Call centre efficient , service man not so .

Call centre friendly and efficient , arranged a call out for the next day.Everyone I spoke to in the call centre had great customer service.
That's where it ended.
The service man that came to my flat was rude with a massive attitude problem.
Really wasn't at all helpful , I told the call centre where he could park , he called me and was barking at me down the phone.
This company is let down by this 'gentleman's' attitude towards his customers.

October 21, 2025
Unprompted review
Rated 1 out of 5 stars

I wish there was an option to give 0…

I wish there was an option to give 0 stars here. If you have a choice and boiler, I would suggest you go with anything other than Vaillant. Their customer service is abysmal. My boiler is 6 months old; it stopped heating water on Thursday. As it was still under warranty, we called Valliant. The earliest they could a technician out was Saturday, which would have been acceptable if they actually showed up. They didn't. Called first thing Monday morning to reschedule and was able to secure an appointment for Monday afternoon. The technician did not show up again. When I called Vaillant, it appeared he had "cancelled." So had to reschedule again, this time for Tuesday. So, I am going on 6 days with no hot water . . . and still no technician.

October 14, 2025
Unprompted review
Rated 1 out of 5 stars

Engineer Condemned my boiler

Engineer Condemned my boiler, he said one thing to me and then went back to the office and put in sludge buildup, they advised on a powerflush which i paid to get done, then they turn around and said we will not send out a engineer to complete the service/repair and left me high and dry, the warranty comes from domestic and general, never use Valliant again, their warranties are useless, and they have got it wrong this time and can prove it, they said the heat exchange is blocked, why am i getting hotwater and heating??

June 27, 2025
Unprompted review
Rated 1 out of 5 stars

Vaillant aroTHERM VWL

We have a Vaillant aroTHERM VWL 55/3 A 230V heat pump that is now four years old. Unfortunately, the system has failed three times during this period, each time leaving us without heating or cooling for extended periods – and Vaillant’s service team has been unable to resolve the issues.

This is despite having a valid maintenance contract and regular professional servicing. For a brand positioned as premium, the product has proven to be highly unreliable.

To make matters worse, customer support has been slow, difficult to reach, and far from proactive.

In hindsight, we regret not choosing another manufacturer, such as Hitachi, which appears to offer more dependable systems and significantly better support.

June 21, 2025
Unprompted review
Rated 1 out of 5 stars

Vaillant warranties arent worth the…

Vaillant warranties arent worth the paper they are written on. They try to wriggle their way out of call outs. I am a heating engineer and found that they come up with excuses like manufacturers handbook not seen on site, water quality low, part too expensive to repair and have refunded premiums paid rather than deal with expensive parts like heat exchangers. I deal with multiple manufacturers and found Vaillant to be the worst for fixing things under warranty. In many cases these boilers have been fixed with simply fitting new parts and other engineers have not agreed with the diagnosis provided by their own staff. Engineers seem to be given too many jobs in one day to allow for enough time to thoroughly diagnose a problem and to fix.

June 13, 2025
Unprompted review
Rated 1 out of 5 stars

DO NOT TRUST/ BUY VAILLANT COMBI…

DO NOT TRUST/ BUY VAILLANT COMBI BOILERS ECOTEC PLUS.
Boiler ELECTRICS failed to START after 3 months and vaillant have purposely made every fake excuse only to want to charge £180 to attend and maybe repair the boiler under warranty. The service is fake, product fake, as it does not function as it should .their call center makes you hold for hours on end only to try everything to scam you take all your details AND MAKE FALSE PROMISES THAT A MANAGER WILL CALL AND WHO NEVER DOES.
It was an expensive mistake to buy their rubbish product.

May 1, 2025
Unprompted review
Rated 1 out of 5 stars

Boiler not working

They came yesterday to fix boiler . Which I done my self it was the pressure .but they still had a look .rubbish now boiler not switching on .it's the weekend no one answered phone no 24 hour service.will be calling on Tuesday to complain.

May 2, 2025
Unprompted review
Rated 1 out of 5 stars

I am being harassed by their computer…

I am being harassed by their computer system. Over the last 2 years I have received many many texts telling me that I should be booking a service for my boiler. In Feb 2024 I sent a message asking them to stop as I had had my boiler serviced by an independent engineer for the previous 2 years. I received a message telling me they would update their records. They didn't. I got more texts. I rang and was told that they WOULD and HAD updated my records. This year I have, so far, had 7 messages from them telling me to book a service. Texting 'STOP' (as instructed in the text) has no effect. One message says 'This chat will now be closed due to no response' but I have been sent 2 more texts since then. This morning I rang and spoke to a Customer Service agent who said she had taken all of my contact details off my record. At 14.30 I was sent yet another text telling me to phone for a service

You can't send a complaint by email - the form on the site doesn't work!

The phone system sends me round and round in a loop so that it is almost impossible to speak to anyone. Anyway, they close the office at 3.30pm.

Who is running their 'Customer Service'.

February 21, 2025
Unprompted review
Rated 1 out of 5 stars

Hours on the phone from one person to…

Hours on the phone from one person to the next, impossible to speak to customer service. I need access to my account to update email address. Was given two email addresses to request full access to my account both were returned undelivered. Why is it so difficult to get hold of the right people in Valliant to help me? Still no success.

February 4, 2025
Unprompted review
Rated 1 out of 5 stars

I bought 2 vaillant boiler

I bought 2 vaillant boiler, they not working properly, one of themhas problem from installing date.
The company glowgreen installing both boiler, and registered for 2 years warranty instead of minimum 5 years warranty!!!!!?????

January 15, 2025
Unprompted review
Rated 1 out of 5 stars

Scam company and service

We had boiler broken. The insurance company sent Vaillant to do the repair.

The engineer came without any clue on repair needed. He then told us I can't fixed as a manager authorisation is needed to complete the repair!. He left without doing anything. now after 10 days we have no heating and no hot water in very coldy weather.

December 26, 2024
Unprompted review
Rated 5 out of 5 stars

Excellent …

I have had superb support and help from Mr George Lightbody, Regional Manager. His professional care has been second to none. I have had ongoing boiler issues and he has always been there for me at the end of a phone line to offer advice.

December 2, 2024
Unprompted review
Rated 1 out of 5 stars

Appalling lack of customer service.

2 year old Glowworm boiler broke down 3 weeks ago.Told engineer would come on 29th, no time given.
so I cancelled everything to be in. He arrived at 4.55!
New part needed. New Appointment given for today, no time slot. Called this AM after 10 min wait was told i had been cancelled. Not by me and not informed of this. New appointment made for today as there was availability. Stayed in all day. Called again at 4 but was told engineer had cancelled. Not informed of this. Another day wasted. Interesting to see if new appointment next Wed 18th will be another wasted day?

December 12, 2024
Unprompted review
Rated 1 out of 5 stars

This is the worst customer service I…

This is the worst customer service I have ever received. If you call no one will answer, when you do get through to someone they are unhelpful and rude. If you are looking for a new boiler, do not use Vaillant! Seriously, DO NOT USE VAILLANT!!

November 29, 2024
Unprompted review
Rated 1 out of 5 stars

Customer service is shockingly bad

Customer service is shockingly bad. Takes a long time to get a through, I was then cut off and had to wait another 10 minutes to speak to someone else. Offered me a boiler service the following week but I was not available, next date they had was 3 months away. I suspect appointments are being held for customers who have paid for an expensive maintenance plan so I am taking my business elsewhere. If I ever need to replace my boiler it will not be one made by Vaillant due to the terrible aftercare

November 21, 2024
Unprompted review

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