WarmZilla Reviews 

Prompt and courteous service

Great services, very responsive

Installation by Roland was courteous and professional. The unit is slightly off level so I am not sure that has an effect, and the electrician did not turn up, so the unit is running off a plug currently which I am not sure is safe, I was asked to send pictures of my fuse box as a seperate mains feed was meant to be installed,

Engineer was early, and left after doing a good job. He was sociable and explained everything.

Aziz did a great job of fitting our lovely UKRadiators 3 column radiator. He took great care over the pipework to ensure that it looked as good as possible and that it complemented the radiator. Very efficient and friendly, I'd definitely recommend him.

A reasonable monthly charge for cover with boiler service included.
The engineer attending for the service was very polite, on time and the job was completed efficiently.

Aziz engineer did a excellent job and I top peeson

Aziz was very pleasant, arrived nice and early, very respectful. Job completed quickly and efficiently

Easy to book and friendly staff to arrange service.
Engineer made contact before arriving to provide time of arrival was friendly, courteous and professional and did high quality job.

Having my new boiler installed was such a quick and easy process. It took less than a week, 5 days in-fact, from placing my order to having it put in.

The communication from Warmzilla was perfect from day one. I was contacted and told exactly what was going to happen and when.

The installers showed up within the timeframe and were very kind and joyous. They respected me and my property, which was very nice.

They started the preliminary work whilst we awaited delivery of all materials and everything fit together like a jigsaw.

When there were any hiccups or matters to mention, the installers explained everything to me and answered any questions I had; such a change to experience honest and genuine people.

The installation was completed in one day and now I get to enjoy my new boiler.

Very pleased and would definitely recommend.

Survey was ok but after placing my order was told the price needed to be increased by 300. That could be a genuine mistake or sales tactics, probably the latter.
The installation was a car crash, engineer was not aware of the job before he started unboxing. Made a lot of mess, didn’t put any protection on the floor, took a week to dry out as he took the old boiler out whilst full of water and it went everywhere. Various problems like installing boiler and the door couldn’t close, at one point we were expecting to have no water for a few days as it seemed to be going so badly. To cap it all I’ll be paying a roofer/builder to repair the mess of a hole left in the roof. Packing a hole made too large for the flu with some old insulation material and then just putting for roof sealant is cowboy at best. I have photos of this going in. Other things list screwing the flu bracket into the mortar not the brick too….

Great service and easy installation. Highly recommended!

UPDATED:
This is an updated review post completion of our boiler installation.
Our boiler was supposed to be installed on Friday. The engineer installing the boiler was unable to complete it due to the flue provided being too short. He told us he had contacted Warmzilla about this but had not heard back yet (Warmzilla has suggested he never contacted them).
I tried to reach out through a number of avenues on the Saturday to get this resolved and a new flue sent. I had no reply on the phone numbers provied on their website, the live chat (according to Warmzilla there was a fault with this on the morning), email, Whatsapp nor their social media accounts.
This led me to put up a 1 star review on here for poor customer care, upon this I then recieved an email from them with no clear resolution (being told this would be dealt with on the Monday) and asking for the review to be taken down. The tone of the email was rude, putting a lot of the blame on myself for ringing the wrong number (the number they suggested I should have rang is not one available on their website nor emails and one I had only recieved one phone call from) and only got worse when I said I would not remove the review until the matter was resolved. I was accused on writing factually inaccurate review that was incorrect and misleading.
On the Monday I hadn't heard anything from them so at 11am I reached out to find out how they would resolve the situation (given we had not been without hot water all weekend). I was told an engineer would be coming out after 3pm that day.
The engineer did not turn up as expected so I had to reach out to them again. At this point I got through to Rhys, who I have to say was one of the few pleasant parts of this experience. He chased the engineer and found out there had been an emergancy which held him up. Both Rhys and the engineer were extremely helpful in resolving our issue and we were able to get the problem resolved that night. The engineer worked late into the night to complete this for us (leaving around 10pm) and I was very grateful for his dedication to this.
I am thankful the work is complete and grateful to Rhys and the engineer for their hard work and dedication to helping. I might suggest that they look into their policy on how complaints are intially dealt with as this very much overshadowed our experience and left a bad taste in the mouth, particuarly as I made them aware I am 6 months pregnant and was finding the situation very stressful.

These guys are superb - our install was super challenging between Reiss at Warmzilla and our installer they managed 2 separate installs, just weeks after our order. So thank you, super impressive service. 👏🏻👏🏻👏🏻

The installer was the best part of the job. Truly a gent to work with. Top stars for Aziz. Further to this the boiler arrived at the same time as the installer. Thank you. It was absolutely brilliant, and I am over the moon.

Update as of 02/09/26. Worcester Bosch had to send an engineer out, due to a leak. Thereafter, I had to run a isolation test, which confirms that there is a leak in the radiator heating system. Hot water is fine. WarmZilla are requesting me to find a plumber which I feel is unfair, after spending multiple thousands of pounds. Will update this post as and when new information comes to light. For the moment, I have hot water, but no heating. (Therefore, rating amended from 5* to 1*)

Update as of 03/09/26. Remedial works had to be completed, however, WarmZilla disagreed to reimburse for these works.

Spoiler alert: If you get a boiler fitted, expect to pay for further remedial work.

Would be a 5* review, but customer service is some-what lacking. A £4000+ boiler installation wasn’t worth a £100 refund for the remedial works I had to pay, out of my own pocket. Beware, shop around and also look at Boxt!

Annual boiler service. It would have been 5 stars but the engineer never called with a time as promised. He still turned up though, was courteous and completed the job quickly.

No big message needed just a great service as usual.
Had a boiler service and the engineer was first class and very friendly.

I completed the assessment for an aircon install on the company’s website and, based on my responses, was instructed to continue the enquiry via WhatsApp as it isn’t as straightforward.

In my experience, the communication was not what I would expect from a company of this size. I was asked to send “videos they can view”, but no clear guidance was given on what was required (for example, whether they wanted footage of the inside, outside, or both). After I sent the requested videos on Saturday, I did not receive a response until Thursday, despite chasing for an update.

When they eventually replied, I was asked to send all of the same information again by email so they could review it further. This made the process feel repetitive and disorganised, and despite the time I invested, I never received a quotation.

Based on my experience, I found the communication unprofessional and the customer journey frustrating. Unfortunately, I cannot recommend the company.