Four Suns HVAC

Excellent customer service!!! Four sons replaced my furnace 2 years ago and, more recently, my AC unit. Of course the AC unit broke during a stretch of hot summer days and even though the company was very busy, they still found the time to stop by the same day I called.
The technician tried a few things to fix our 20 year old AC unit in hopes to make it last a little longer and save us some money. He thoroughly explained the problem and after walking through the pros and cons we decided that we would go with a new unit. We scheduled time for them to do the install but since they were so busy they couldn’t make it out any sooner than a week. Since we would be without AC for week, Four Sons was nice enough to install a portable AC unit for my 5 month old twins bedroom! Life saver! And to top it off, they were able to come 4 days earlier then expected to do the install — truly appreciated!
In my experience, Four Sons work hard to put their customers first. They are honest, reliable guys who have never tried to up sell us products or services and their prices are very reasonable. We now have a cool house and happy babies.
They are our go-​to guys.

We have used Four Suns since we bought our house in 2012 as part of our home warranty, but kept using them because they are great. They are always prompt, very knowledgeable, and do a great job. I would highly recommend them if you are anywhere nearby.

I have been using Four Suns for about 7 years. They are a great bunch of guys. They clean my furnace every year and serviced my ac several times. Will always use Four Suns whatever house i live in. They are honest and always helpful and very affordable. Thank you John, Jason and your whole team:)

I’ve been using Four Suns for all of my HVAC needs for ten years, over the ownership of two homes in Naperville. They replaced the furnace in my old home and just recently replaced the furnace and the entire AC system in my new home. I’ve never had any reason for a single complaint with them. They’re always on time, they always do the work well, and they’re always incredibly polite. Jason will take the time to explain everything to your full satisfaction. Most importantly, in all the work they’ve done for me over the years, I’ve never had to have them back to fix anything up! Even more importantly, I have the utmost confidence that should any problems arise, they’d be there in a heartbeat. This group takes great pride in their work, and it shows.

Zero stars.
Four Sons was sent to repair a weak AC unit via my HWA warranty service. The contractor got here and ignored everything that I tried to explain to him. He was rude, unprofessional, and he refused to even check the capacitor issue that spurred this HWA claim in the first place. I had my own independent HVAC technician look at the capacitor in the blower motor, and he said it was shot and that it needed replacement. However, this Four Sons guy wouldn’t even LOOK at it! Instead, he proceeded to go outside, and without my knowledge or confirmation he pumped 4 pounds of Freon R-​22 into my aging HVAC cooling system. Then he comes in and asks for a payment of close to $ 240, stating that HWA only covers $ 10-​worth of R-​22. Neither the contractor or HWA made any attempt to inform me of this charge for the Freon R-​22. I was clearly told in an email from HWA that I would only be liable for a $ 100-​deductible for this service. Any additional amount that would potentially have to come out of my pocket, should have absolutely been made aware to me BEFORE this service was performed! The contractor and HWA did *NOT* do this, or even attempt to do this. I absolutely would have refused the service had I known the cost ahead of time, especially considering that I plan to replace the whole HVAC system in a year or two. So I would have NEVER sunk an additional $ 240 into a dying system. A $ 100-​deductible, yes. $ 240 for Freon R-​22, absolutely not.
And the absolute worst thing is this: The 4 pounds of Freon R-​22 that this contractor pumped into my system is just going to leak out in the coming weeks/​months anyways. The contractor made ZERO attempt to even look for, or repair the leak! The contractor even admitted this, and he fully expects it to happen! He stated that there was most likely a leak (and he didn’t even need to say that, since it is obvious that there is a leak considering that ²⁄₃ of the system’s R-​22 was gone in the first place)!
So not only did this contractor show a complete disregard to me and my HVAC cooling system, but he showed a complete disregard for the ENVIRONMENT considering that 4 pounds of Freon R-​22 is about to knowingly leak out of a faulty cooling system. Goodbye ozone layer, hello skin cancer.
Good contractors fix problems, and they leave with the customer happy. This is not one of them. Avoid them at all costs.

Great guys; you always get an honest quote and a fair price. I call them every year for a spring tune up on the AC and a fall tuneup on the furnace. They just replaced both my furnace and water heater and gave me the best price I could find and installed it 2 days later.

Our air conditioning went out and they came out the very next day. These guys were great! They explained everything that was wrong with our furnace, showed me what happened and replaced/​fixed everything within the same day. Very informative and honest. We just moved to Naperville and I am glad we found them. They were highly recommended through Angie’s List.

These guys saved my house from disaster.
I left the country over the holidays, and on Christmas morning I happened to check my Nest App and saw that it was 39 degrees inside my house. This was the week of the Polar Vortex in December 2013. I knew that I didn’t have much time before the pipes would freeze, burst, and flood my house. I was in France and basically helpless to do anything.
I emailed Four Suns and explained the situation, and on the morning after Christmas they went to my house. They’d been there before for another HVAC issue I had and I trust them enough to tell them how to get into my house when I wasn’t there. They fixed the igniter on my gas heater and warmed up my house before any damage was done. I think it even took me a few days to get payment to them because I had to email my credit information and such and they were very understanding.
I’m so grateful to them for going above and beyond – during Christmas – to help me save my house when I couldn’t do anything for it. Give your business to them!

Woke up to find A/​C was not working on one of hottest days of summer. Called at 730 am to schedule repair. Talked to Jason on phone, and by 845 he was at the house to repair. Less than an hour later, AC is back up and running. Very pleasant to deal with, didn’t try to add things here and there to replace. Freon was a little low, so he topped that off free of charge. Much cheaper than what I would have expected. They have also fixed a small furnace issue a couple years ago, with the same prompt and friendly service. Very highly recommended.

We recently moved to the area and needed our new (to us) furnace looked at. We hoped when we called Four Suns that they wouldn’t take our money and leave us high and dry. Our furnace was working well when it worked, it would just stop working sometimes making it difficult to find the problem. I called, they told me how to work with it and then proceeded to be even more amazing every step of the journey. They came out and when they needed to look further into the problem, they worked with our past payment and home warranty. They are above and beyond an honest, dependable, competent company. Absolutely call them if you need any heating or cooling work!

These guys are outstanding! Our AC unit went out and they put us on the schedule as the first appointment the following morning. The gentleman did a great job of explaining to my wife what the problem was — he even left the bad part with her. Literally the next day our water heater went out. We called the company who installed the water heater (NOT Four Suns) and the guy said there was no reason for him to come out. He said «with that model, it’s one of two things and it would take me a couple days to get the parts either way».
So, we called Four Suns and asked if they work on water heaters. They do — and they had a guy who was in the area and he stopped by within the hour. It turns out there is a tiny unmarked reset button on the water heater — he got it re-​lit and even used a Sharpie to mark the reset button for future reference. He didn’t even charge us for a service call!
It is seriously hard to find good service by quality, honest people these days — that’s why I felt compelled to write this review. We will be using these guys for any of our needs in the future and I would certainly recommend them!

I called these guys for a spring check-​up. Quick response, professional, educational, and great price. Pretty straight forward service. I am ready for the cold to be done to use the AC unit.