Boiler installation carried out. Kyle the engineer called ahead of time to inform me the time he was arriving. Him and the other engineer were very friendly and efficient. Few hours and the house was... Toon meer
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Lees wat reviewers zeggen
Fast and efficient Amy is wonderful and very quick to reply . This is my second time using them and was taken care of properly. Website easy to navigate and staff very friendly. Shout out to Mason... Toon meer
Shocking service, took months to book in my boiler getting serviced even though I pay a monthly sub subscript. The person came round, did it within five minutes then came back because they forg... Toon meer
Really happy with our new boiler installation ! 😊 Both engineers were friendly and professional. Everything went smoothly and we’re very pleased with the service. Thank you!
Bedrijfsgegevens
- Boiler leverancier
- Laadstation voor elektrische voertuigen
- Gasingenieur
- Gasinstallatieservice
- Gasfitter
- Ketel- en verwarmingsdienst
Over WarmZilla
Geschreven door het bedrijf
Making Home Services Easy
WarmZilla helps homeowners across the UK with boilers, air conditioning, home cover and EV charging, making it easier to keep your home comfortable all year round.
We believe arranging home services shouldn’t feel stressful. That’s why we’ve built a simple, transparent process with fixed online prices, trusted engineers, flexible finance options and friendly support from real people whenever you need us.
Whether you’re replacing an old boiler, installing air conditioning before the next heatwave, or looking for ongoing protection with home cover, our aim is always the same: to make the whole experience straightforward from start to finish.
Thousands of homeowners have already trusted WarmZilla with their homes, and we’re proud to continue helping more people across the UK every day.
Explore WarmZilla's Services
Thank you for taking the time to read our reviews. If you’ve recently used WarmZilla, we’d love to hear about your experience too. Your feedback helps us improve and helps other homeowners choose a company they can trust.
Best Price Guarantee
We won't be beaten on price
If you find a cheaper price on a like-for-like installation elsewhere, we guarantee to beat the price and take an extra £50 off your order.
Contactgegevens
Capital Tower, Greyfriars Road, CF10 3AG, Cardiff, Verenigd Koninkrijk
- 02921 684 432
- ask@warmzilla.co.uk
- warmzilla.co.uk
4,4
Uitstekend
2K reviews
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Heeft 86% van zijn negatieve reviews beantwoord
Reageert doorgaans binnen 2 weken
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Excellent Service Despite a Challenging Installation ⭐⭐⭐⭐⭐
Here’s a polished Trustpilot review that sounds natural and detailed:
I had an excellent experience with Mozilla from start to finish and wouldn’t hesitate to recommend them.
I live on the 14th floor of a high-rise block, and my boiler flue is located on the outside of the building, which makes it difficult to access. Because of this, I’d previously contacted three other companies. They initially said the work would be possible, but after attending they changed their minds, or tried to charge extortionate prices for scaffolding and other access equipment without properly exploring alternative solutions.
Mozilla were completely different. The colleague I spoke to took the time to listen to all the details of my specific situation and understood the challenges straight away. Rather than dismissing the job or immediately suggesting expensive access methods, they explained that there was another approach they could take. They were knowledgeable, helpful, and gave me confidence that they knew what they were doing. They also got everything booked in quickly and kept me informed throughout.
On the day, the engineer arrived on time, was very friendly and professional, and explained everything to me in great detail before carrying out the work. He completed the job in around half a day despite the complications with access, and everything was left clean and tidy afterwards.
I’m extremely happy with the service I received. It’s refreshing to find a company that takes the time to understand a customer’s situation instead of looking for ways to overcharge. If anyone asked me for a boiler company, Mozilla would definitely be my first recommendation.
20 april 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi Rhys,
Thank you so much for taking the time to leave such a detailed and thoughtful review. We’re delighted to hear that your experience with WarmZilla exceeded your expectations.
We understand that your installation presented some unique challenges, and we’re pleased our team could take the time to fully understand your situation and find a practical solution without resorting to unnecessary costs. Providing honest advice and finding the best approach for each customer is something we take great pride in.
It’s also fantastic to hear that our engineer kept you informed throughout the visit, completed the work professionally, and left everything clean and tidy. We’ll be sure to pass your kind comments on to the whole team, they’ll really appreciate the recognition.
Thank you again for choosing WarmZilla and for recommending us so highly. It was a pleasure to help, and if you ever need us again in the future, we’ll be here to help.
Good price for Air Con & Great Service
Good price for Air Con - great installation by Roland who was very can do and conscious of installing the outside unit in a discreet position.
29 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for your fantastic review!
We're delighted to hear you were happy with the value of your air conditioning installation and that Roland made such a positive impression. We'll be sure to pass on your kind words to him—he'll be pleased to know his can-do attitude and attention to discreetly positioning the outdoor unit were appreciated.
Thank you for choosing WarmZilla, and we hope you enjoy your new air conditioning for many years to come!
WarmZilla marked my complaint as "resolved" even though it was never resolved.
For months we've been going back and forth with WarmZilla without reaching a satisfactory outcome. Instead of resolving the issues, we ended up paying additional money out of our own pocket to have another engineer correct problems following the installation.
In my experience, WarmZilla did the bare minimum to close the case rather than properly addressing the issues we raised. The entire process has been stressful, time-consuming, and extremely frustrating. We also had to deal with additional damage and unexpected costs after the installation.
Based on my experience, I cannot recommend WarmZilla. If you're considering using them, make sure you understand what is and isn't covered, document everything, and be prepared for the possibility of a lengthy dispute if something goes wrong.
This review reflects my personal experience with WarmZilla and my honestly held opinion based on that experience.
26 januari 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for taking the time to share your feedback. We're genuinely sorry to hear how frustrating this process has been for you, and we appreciate that it has been a stressful experience from your perspective.
That said, we respectfully disagree with a number of the points raised in your review. Throughout this matter, we worked to investigate each concern, arranged follow-up visits, and carried out all remedial works that fell within the scope of our installation and warranty obligations. Where issues were identified that were unrelated to our work or fell outside our responsibility, we explained this as clearly as possible.
While we understand that you chose to instruct another engineer, we recognise that this has led to additional costs for you. However, we do not agree that these costs were the result of shortcomings in our installation.
We always aim to resolve concerns fairly and transparently, and we're disappointed that we were unable to reach an outcome that satisfied you. Nevertheless, we wish you all the best going forward, and thank you again for sharing your feedback.
Overall satisfactory
Initial installer turned up decided not to do the job and made up we had a gas leak and left. Warmzilla sent another person out and they fitted it no problem or issue and no gas leak. The sales team were very apologetic and quick to try to resolve. Overall I've got a working boiler a lot cheaper to what British Gas quoted us. By about 2k less.
17 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave your feedback.
We're sorry that your initial experience did not meet the standard we strive to provide. We appreciate how frustrating it must have been to be left without hot water and to receive conflicting information following the first engineer's visit.
We're pleased that our team was able to arrange a second visit promptly, and that the installation was completed successfully without any issues. It's also great to hear that our sales team kept you informed and did their best to resolve the situation as quickly as possible.
We also appreciate your comments regarding our weekend support availability. While customers can contact us via email, telephone, live chat and our online enquiry forms, we understand your frustration at not receiving a response over the weekend. Feedback like yours helps us identify areas where we can continue to improve our service.
Thank you for recognising our competitive pricing and the efforts of our team to put things right. We appreciate your patience and your honest feedback.
Antwoord van WarmZilla
Hi Kevin,
Thank you for your kind review! We're so pleased to hear you were happy with the service. Your feedback means a lot to our team.
If you need anything in the future, please do let us know.
I had an air conditioning system…
I had an air conditioning system installed by WarmZilla. The team completed the work professionally and tested the system thoroughly. Everything is now working perfectly and to a high standard. The engineers were helpful and the overall experience was very good. I’m happy with the result and would recommend WarmZilla.
18 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave such a positive review. We're delighted to hear that you're pleased with your new air conditioning system and that everything is working perfectly.
It's great to know that the engineers completed the installation to a high standard, thoroughly tested the system, and provided helpful support throughout the process. We take pride in delivering a professional service and ensuring our customers have a smooth experience from start to finish.
Thank you for choosing WarmZilla and for recommending us. We truly appreciate your support and hope you enjoy the comfort of your new system for many years to come.
Sometimes it’s better to have experienced Engineer
Been paying Warmzilla for 3 years for boiler service and breakdown plan £19 per month. It took them more than a month to organise service compared to last year. Engineer turn up for service and could not get the boiler to turn on and then walks out without any paperwork and Warmzilla tells me to get this sorted by Vaillant. They were able to get the Engineer out on next day (Saturday) and they confirmed nothing wrong with the Boiler. Apparently the subcontractor for service didn’t understand the working of Boiler and how thermostat functioned. It’s been working fine ever since. Amy however kept us informed and replied promptly to all the emails. Now waiting for rebooked service appointment.
19 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for your feedback. We are sorry to hear that you were left feeling disappointed following your recent service visit.
As discussed with one of the team, your central heating system contains a number of different components, many of which would be covered under your breakdown plan. However, following visit, the issue was determined to be with the boiler itself, which remains under the manufacturer’s warranty. For this reason, you were advised to contact the manufacturer directly so that the fault could be addressed under the terms of that warranty.
We appreciate that being redirected was frustrating, particularly after the service visit, and we apologise for any confusion caused regarding the contact details provided.
We value your custom over the past three years. Please do let us know if we can be of any further assistance.
Big promises, no delivery
Happily took my money and a timed, dated booking for a boiler check and repair. I liked the fixed price and availability, however the phone call from them the next day raised a fear, later confirmed, that they were unable to source an engineer and the cancellation email later that day confirmed it. 10 seconds to take the payment, days to refund it.
15 maart 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for your feedback. We sincerely apologise that we were unable to carry out the work as planned and understand how disappointing this must have been.
Unfortunately, the engineer assigned to your appointment became unwell, which meant we were unable to fulfil the appointment as purchased.
We have checked and can confirm that your refund was processed on the day the booking was cancelled at your request. While we action refunds immediately, the time it takes for the funds to appear back in your account is determined by the payment provider and is unfortunately outside of our control.
We are sorry for the inconvenience caused.
A very polite and friendly gas engineer…
A very polite and friendly gas engineer serviced my boiler. He was very thorough and gave me useful feedback afterwards.
16 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave such a positive review.
We’re delighted to hear that our engineer was polite, friendly, and thorough during your boiler service. Providing clear feedback and excellent customer service is something we take great pride in, so it’s wonderful to know this was reflected in your experience.
We appreciate your kind words and look forward to assisting you again in the future.
Price and service was very good
16 juni 2026
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave a review.
We're glad you were satisfied with both the value we provide and the service you received.
We truly appreciate your feedback and look forward to assisting you again in the future.
AC Installation
I recently had an air conditioning installation carried out by Warmzilla. The process was smooth and professional. Once the installation was complete, the engineer clearly explained how the system works and asked me to get in touch if I experienced any issues. I highly recommend their service.
12 juni 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for your wonderful review!
We're delighted to hear that your air conditioning installation went smoothly and that our engineer provided a clear explanation of the system and its operation. We pride ourselves on delivering a professional service from start to finish, so it's great to know we met your expectations.
We truly appreciate your recommendation and are always here if you need any assistance in the future. Enjoy your new air conditioning system!
Problems resolved, All Good
Had a few problems but they were resolved by the company and they kept me informed. All tradesmen were excellent.
4 juni 2026
Antwoord van WarmZilla
Hi Dave,
Thank you for taking the time to leave us a review.
While we're sorry to hear there were a few issues along the way, we're pleased that we were able to resolve them and keep you informed throughout the process. It's especially rewarding to hear your kind comments about our tradesmen, and we will be sure to pass on your feedback to the team.
We appreciate your patience and support, and we're delighted that you were happy with the overall service.
Telephone not answered
Telephone not answered . Live chat unavailable at 4pm on a Thursday.
Waiting to book boiler service for weeks ....
Very strange
11 juni 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for your feedback, and we're sorry to hear about the difficulties you've experienced while trying to arrange your boiler service.
We've looked into this and can see that a call was made to our sales line. We haven't been able to locate a live chat message, but we'll certainly investigate this further as we understand how frustrating it must have been to feel unable to get in touch.
We'd like to get this resolved for you as quickly as possible, and a member of our team will be in touch with you today to assist with booking your service and to discuss your experience.
Thank you for bringing this to our attention.
Im very happy with the service ☺️
Im very happy happy with the service ☺️
10 juni 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi Jess,
Thank you for your kind review.
We are delighted to hear that you are very happy with the service you received. Providing excellent customer service is our top priority, and it's wonderful to know that our team met your expectations.
We truly appreciate your feedback and look forward to serving you again in the future.
Where do you start with this company
Where do you start with this company
Firstly steer clear.
I had the misfortune of purchasing a EV charger from this company in August 2025.
They sub contracted 0out the ev installation to a third party company
It’s was installed incorrectly, causing damage to my home central heating system, due to a wiring fault on installation.
The unit was exchanged and still didn’t work.
6 months after my initial complaint and numerous emails what’s app messaging I was in formed that the issue had been forwarded to the senior management team
This procrastination team must only meet annual.
So 10 months into the issue still nothing,
But no doubt a comment from warmzilla will be attached to this review
29 augustus 2025
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for taking the time to share your feedback. We are sorry to hear about your experience and understand your frustration, particularly given the length of time this matter has been ongoing.
We can see that a member of our team has already tried to contact you, and they will continue to look into this further to support you with a resolution.
I had a complaint but this was dealt…
I had a complaint but this was dealt with efficiently, with a full apology & compensation!
8 juni 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for your review.
We sincerely appreciate you giving us the opportunity to address your concerns. While we're sorry that your initial experience led to a complaint, we're pleased that our team was able to resolve the matter efficiently and to your satisfaction. Your feedback is valuable to us, and we look forward to welcoming you again in the future.
Fitter did an excellent job,very clean…
Fitter did an excellent job,very clean tidy in is work,I would recommend Aziz to anyone,once again, thanks.
3 juni 2026
Antwoord van WarmZilla
Hi Janet,
Thank you for your wonderful feedback. We’re delighted to hear that Aziz did an excellent job and that you were pleased with the cleanliness and tidiness of his work.
Your recommendation means a great deal to us, and we’ll be sure to pass your kind comments on to Aziz.
Thank you for choosing our services, and we look forward to assisting you again in the future.
Marcos the plumber is a nice guy and…
Marcos the plumber is a nice guy and kept us informed. Tidy finish.
1 juni 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave us a review.
We're pleased to hear that Marcos kept you well informed throughout the job and delivered a tidy finish. We take great pride in providing excellent customer service and high-quality workmanship, so it's wonderful to know your experience reflected this.
We'll be sure to pass your kind comments on to Marcos. Thank you for choosing us, and we look forward to helping you again in the future.
Generally an excellent service
Generally an excellent service. I had been let down by other companies for reasons connected to flue installation and meter pipework. Warmzilla agreed to deal with these issues within their quotation. Installation of my new boiler was done within a few days of my accepting the quote. Two criticisms: Delivery of the new boiler, done on the day of installation, was delayed because the courier's van broke down. This meant installation did not complete until 2000. It might be better if boiler delivery took place before the installation day although I accept this may cause inconvenience to the customer. Also, the boiler registration process was not made clear. Apart from these points I am very happy with Warmzilla's service.
31 mei 2026
Antwoord van WarmZilla
Hi Neil,
Thank you for taking the time to leave such a detailed review. We're delighted to hear that we were able to help where other companies had been unable to, and that your new boiler was installed within a few days of accepting the quotation.
We also appreciate your constructive feedback. Unfortunately, the courier's vehicle breakdown on the day of delivery was outside of our control, but we understand the impact this had on the installation finishing later than expected. Your suggestion regarding earlier boiler delivery is valuable, and we'll take it into consideration as we continue to improve our service.
We're also sorry that the boiler registration process was not communicated as clearly as it could have been. While information regarding the registration timeframe was provided at the point of purchase, we appreciate that this may not have been as clear as it should have been, and we'll review how we communicate this process going forward.
Thank you again for choosing Warmzilla. We're pleased that, despite these issues, you are happy with the service you received and we wish you many years of reliable heating from your new boiler.
Kind regards,
The Warmzilla Team
Despicable company
Despicable company. I would leve zero stars if that was an option. I had a boiler fitted recently,I messaged the fitter the morning after installation to tell him there was water coming through my ceiling and he did not message back, he had left a radiator leaking that has damaged my floor and ceiling. He also left a magnetic filter leaking. They also stood on my kitchen worktop instead of using step ladders and have caused damage to that. Warmzilla and their fitter have not been back to have a look, inspect the work or put things right. They asked for photos which I sent and just accepted zero responsibility. They said my kitchen worktop was fitted incorrectly, it has been in there for over 10 years and regardless of how it is fitted a tradesman should be using step ladders not a kitchen worktop. That is a health and safety issue! The boiler has been having pressure issues since it has been fitted, I will be taking this further with legal action DO NOT USE THIS COMPANY!
6 mei 2026
Review zonder uitnodiging
Antwoord van WarmZilla
Hi,
Thank you for taking the time to leave your feedback.
We can see that a member of our team has already been in contact with you and that an engineer has attended the property to investigate the issues raised. We are continuing to review the findings from the visit and the details of your case to ensure everything is properly assessed.
We appreciate your patience while this is being looked into and will continue to work with you towards a resolution.
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