(303) 872-8965

Reviews

Reviews


From 162 reviews
Sean K

Reliable and trustworthy. Much affordable too.

Kathryn C.

They were great! Free estimate. Sean was so helpful with getting it all set up. Install was great too. Very nice crew, put blankets down to keep mess minimal. Polite. Amazing price as well, lowest quote and I got a bunch of estimates. They …

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via Yelp
William Kurtz

Fast, efficient, and friendly

via Google
Christine Stanton

I have used Controlling Systems for 6 years for multiple houses. They are prompt, professional, knowledgeable, and reasonably priced. I highly recommend them.

via Google
Jenny K.

Controlling Systems replaced our furnace and installed an AC unit when we bought our home last summer and were very professional, curious, and prompt.

When the carbon monoxide monitors went off in our rental property on Sunday they were …

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via Yelp
Ana Carrera

Very professional company with excellent customer service, everyone from office staff to techs. We've had great experience for everything from new installations of furnaces, water heaters and A/c at multiple properties, to repair and …

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via Google
Mara C

Outstanding! Our furnace stopped working over New Years weekend. We tried to find someone to repair it on Monday, the 2nd, which was the league holiday. No one was available until Wed. and it was cold! Controlling Systems came out, were very professional and got it working at a very reasonable cost. Top notch service!! We highly recommend them!

Shelly Ford - RTM Faculty

Great company with very experienced employees.

via Google
Robert

These folks respond quickly, are highly customer-focused, do their work well, and are priced fairly. There were two things that really impressed me about them: 1) our furnace was not working and it was cold. They were not the first company to come out but they were the ones who offered to get our heat going--safely--on a temporary basis until we could get permanent repairs--to "take the pressure off" making a decision to repair or replace and which contractor, and product, to select. My wife and I will never forget that no strings attached offer of help. This allowed us time to shop and make a reasoned decision, look at product ratings on Consumer Reports, and get estimates from others. They then made us a solid, reasonable proposal which we weighed against two others, and chose Controlling Systems. 2) the work was done quickly, efficiently, with great follow up on our satisfaction. Our questions were answered in layman terms. So yes, we will use Controlling Systems again. Thank you.

Ryan C.

Everything was done in a timely manner and took proper steps to insure stuff didn't blow around my house.

via Yelp
Jason Duex

Excellent, just as it has been in the past.

via Google
gardenerj

I was very frustrated with my heating system and didn't really understand why it wasn't keeping my house warm during our cold snaps. Brent and Sean were great about coming out in a timely manner (multiple times), teaching me how boilers …

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via Google
Bob

Very Professional, knowledgeable and timely!

Evan

Great job, Gus and Lou were really helpful. I left a yelp review.

Evan T.

Gus and Lou came out to work on my fireplaces and swamp cooler. They were prompt, professional and helped me understand the way my fireplaces work. I will be using this company for all my systems needs in the future. Thanks

Evan Templeton

via Yelp
Abby Waterman

From my first conversation to set up appt. I was pleased about this business, as the man I spoke to seemed concerned and sympathetic when I said furnace was not functioning properly and I was cold in my house. Sean, the repairman, was …

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via Google
John B.

From planning and using the Denver energy saver discounts to full installation, totally professional, fast, clean and effective. Removed old Furnace and AC and installed new furnace and AC.

Satisfaction.

via Yelp
Kevin Souza

I have been a happy customer of Controlling Systems since I had my 28+ year furnace replaced by them in 2008. They installed a top of the line Carrier Heat Pump, Furnace and Electronic air cleaner then and I have used them ever since for …

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via Google
John Bridges

Excellent communication, polite and informed sales person, and the installation of Furnace AND AC went quickly and without a glitch!

via Google
breanna wittman

excellent and very friendly. Great service

via Google
maryT williams

I have been exceptionally pleased with Controlling Systems, Inc for over ten years now. They have rebuilt my furnace, installed a new AC compressor and a new water heater, and repaired my humidifier, as well as performed maintenance check-…

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via Google
Scotty Hudson

Excellent service! The work was scheduled and completed quickly. The technician (Brent) was extremely knowledgeable and thoroughly explained the condition of my furnace and the work he performed. He even provided me tips on what to look for…

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via Google
Erica

We have several rental properties and have worked with many HVAC companies in the past. Controlling Systems was one of the best! Their people are very knowledgeable and have been amazing to work with! They are now our go to company for all of our HVAC needs.

Holly Jean Ganster

Always prompt, friendly, and professional. Not the cheapest, but you get what you pay for.

via Google
Suzanne D.

Very good customer service. They've installed 2 furnaces for us, one ten years ago and a second one this year. I had a lot of problems with the first furnace, but they were extremely helpful. Brent is very professional and qualified.

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via Yelp
Priscilla Hobdell

Grafoplast Wiremarkers has been a customer of Controlling Systems for a number of years. We are always happy with their level of service, including timeliness, courteousness, thoroughness and we could go on, but we think you get the picture…

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via Google
Meaghan T

We have had Controlling Systems out to our home on numerous occasions and are very happy with the services they provide, as well as the pricing. It's more important to us to find a company we can trust and we have found that in this company…

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via Google
Tanya G.

We just had our furnace/humidifier serviced by Sean. He was on time and very professional throughout the appointment. He explained what he was doing and why and also let us know

what kind of filters to buy that would be the most beneficial …

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via Yelp
Sam Doniach

They installed a new furnace for me recently and I was very happy. They came out promptly to give a free estimate, the tech that came out (Gus) was extremely knowledgeable and professional and talked about exactly how he would set up the …

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via Google
Sam D.

These guys installed a new furnace for me recently, and I would highly recommend them. Gus came out very quickly after I called to give me a free estimate, and talked about exactly how he wanted to set up the furnace for optimal performance…

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via Yelp
Cory C.

I called Controlling Systems to come out and service my furnace and humidifier. The technician that showed up (Brent) was very professional and carefully walked me through everything he performed while answering all my questions. He also …

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via Yelp
Annie G.

I had such a great experience with Controlling Systems and would highly recommend them! I came on Yelp to read reviews to get my furnace cleaned, inspected and certified. I was selling my home and this was required. Controlling Systems told…

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via Yelp
David C.

Controlling systems and Gus were great! Prompt, helpful, honest. My furnace went out this winter and Gus was able to fix it: he gave me all my options (replacing it, fixing it) and let me decide without pressuring me to go with the more …

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via Yelp
Tyler Elliott

Controlling systems does a great job. Very professional. All three times I have used them (2 yearly maintenance) they have done a thorough job of checking everything and also do a great job of explaining any possible issues. I find this …

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Response from business owner

Tyler thanks for the review...and more importantly thanks for your business. We appreciate your trust in Controlling Systems Bill East Owner Controlling Systems Inc.

via Google
Jack P.

Scheduling appointment was efficient and timely and technician arrived within stated window. Work was performed professionally and the issue with my Hot Dawg heater was resolved, although it did require ordering a part and a second visit. …

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via Yelp
Holly G.

I have used controlling systems for our swamp cooler and furnace issues. Their customer service is above and beyond my expectations. Their prices are very fair and their quality of work is top notch.

via Yelp
Karen R.

Gus arrived on time. Smile on his face. Got right to work. Figured it out quickly. Fixed & done in about 30 minutes. Yelp coupon made it very affordable.

via Yelp
Myranda M.

I contacted Controlling Systems to fix my gas fireplace. It was easy to find a time to schedule the appointment. Gus came out today and he was on time and very professional. He was done in less than 30 minutes and the repair was simple and …

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via Yelp
Jason D.

They were able to send over a technician within 24 hours after I called while many other companies were not able to come out for days. They got the boiler up and running. Admittedly, it stopped running the next day. They came back the next …

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via Yelp
S M.

Thank you for correcting the issue. Brent came out turned the thermostat back on and diagnosed the problem with the furnace. He explained the repair price and provided a quote for a replacement. He was very knowledgeable and courteous.

via Yelp
Scott O.

Great experience! Gus came out to my house promptly to assess the property and provided several options/prices for my new furnace(s). Once I narrowed the options down to the best solution for my family, they were very quick in providing a …

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via Google
Scott O.

Great experience! Gus came out to my house promptly to assess the property and provided several options/prices for my new furnace(s). Once I narrowed the options down to the best solution for my family, they were very quick in providing a …

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via Yelp
Doug M.

Had Sean out today to give estimate 2nd on fixing some part on my system before that Sean checked a couple simple fixes. Ended up replacing the part and Sean helped fix some issues we had with our thermostats. Sean was very personable and …

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via Yelp
Kathryn Dailey

Controlling Systems went out of their way to take care of their customers. Gus helped us find a system that worked for our needs. It's a company that has a lot of integrity and we highly recommend them.

via Google
Aaron B.

After some issues I experienced with the original service the company personally called me to find a way to make it right. They sent out another technician who was extremely helpful and knowledgable and they provided a refund for charges …

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via Yelp
Marie H.

I loved these guys! Shawn was the tech who came to service the furnace. He was very friendly and informative. He taught me some great best practices to follow that will save us money on our energy bill. I have them a try and they work …

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via Yelp
Eva M.

Our AC Compressor was making a very strange sound & Sean came over to look at it. When his first theory wasn't correct, he took the time to test some others and ultimately solved the problem! We now have a much quieter & more efficient unit…

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via Yelp
Sharon S.

Our tech for fireplace cleaning was punctual, very friendly and extremely knowledgeable. We will definitely ask if they'll travel to our new home for the future!

via Yelp
Andrew W.

We just installed a brand new AC unit and was given a $400 discount by Controlling Solutions. I received three bids from the major players in town and Controlling Solutions definitely won our business. Great Yelp reviews really helped with …

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via Yelp
Steve W.

Another good experience with Controlling Systems. Basically a thorough maintenance/cleaning service call on my A/C because the coil and line were freezing up. I trust these guys a lot – they discussed the maintenance work, showed me where …

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Response from Bill E.

Hello Steve,

Thanks for taking the time to post a review. We greatly appreciate your business.

Bill East

President

Controlling Systems

via Yelp
Matt A.

They tuned up our furnace and got our swamp cooler ready for summer. We had a couple scheduling issues that they handled well. Overall, I was pleased, just not wowed. So 4 stars from me.

via Yelp
Jennifer B.

Fast, HONEST service! Recommended for sure!

via Yelp
Mike G.

I called Controlling Systems because I was having some furnace issues in early May. We really don't need the heat now, but I figured I'd get it serviced now and not worry about it come winter. Sean showed up on a Saturday and was very …

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via Yelp
Scott B.

Furnace stopped working yesterday. I called Controlling Systems and Gus was out this morning. A pressure switch was dirty and he cleaned it up. Works now. Super easy and Gus was a great guy. I would recommend.

via Yelp
Kevin C.

Bought the Yelp deal after our furnace stopped working. Gave them a call early in the morning and they were out within about 5 hours within the time window they stated. Our technician, Gus, diagnosed the problem quickly, got it repaired …

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via Yelp
Jackie G

They are reliable and fairly priced. They are tolerant with working with me (out of state) and my renters which can be challenging. I would recommend their services.

via Google
Tyler E.

Wow! What a great company. We had Sean and he was awesome. Did a great job and was very knowledgeable. He gave some great tips on how to get better air flow and to help the furnace that I was doing incorrectly. Thank you guys.

via Yelp
Shane S.

I've had a whole new furnace and duct work installed by Controlling Systems. Really happy by how competitive their pricing was, furnace runs great, and appreciate their after care to take care of some small changes.

via Yelp
Susana A.

Top Notch Service. I called due to no heat in my house. Service Tech was here at the appointed time. He did call to say he was in route. Solved my issue within minutes, gave me a quote and also mentioned a Coupon they had available. That …

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via Yelp
Mike M.

The service was performed the same day and very professionally. Gus the technician was thorough and answered all of my questions in a patient and thoughtful manner. I would recommend them to friends.

via Yelp
Dan H.

Our furnace stopped heating, was blowing cold air, and it was below 20 degrees, so we called Controlling Systems. They scheduled a same day appointment, and Sean arrived when they said he would. He diagnosed the problem (burned out limit …

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via Yelp
Frank A.

They called to follow up and explain why they were more expensive. Thank you very much for being professional. And I look forward to the installation.

via Yelp
Samantha L.

We had two vents in our new house that weren't pushing out heat at all. Controlling Systems was great and said if they couldn't diagnose the problem because ducts were in the wall or something, they wouldn't charge the $49 diagnostic charge…

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via Yelp
Christian L.

Controlling Systems sent Sean, who was very nice and knowledgeable. We had a great conversation, even a little small talk about music. I expressed interest in zone heating, and instead of just trying to sell me on the considerably greater …

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via Yelp
H. Julievon

Everything was good from start to finish.

via Google
Fernando O.

Called to get a tune up on my furnace, they did a great job and were very knowledgeable. The furnace is working great now, fixed some things while doing the tune up and didn't charge me extra for. The only thing is they didn't call me …

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via Yelp
Amanda E.

I purchased the yelp deal and called to set up an appointment to have an issue with my furnace addressed. Appt was set for 12-2, Friday 1/9/15. By 2pm no one had called or showed up. I left a message at the office and received a call back …

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via Yelp
Kevin M.

The owner scheduled the service call and was very personable. Sean the tech was exactly on time, was super knowledgeable, and really friendly. He diagnosed and resolved my furnace issues quickly for a fair price. I high recommend …

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via Yelp
Danielle J.

Hallelujah!

Gave these guys a call based on the Yelp reviews and everything went super smoothly from booking to finish. I've had bad luck with service appointments with other companies in the past so I am always ready for the worst when I …

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via Yelp
Fran M.

Our heater went out during the night and the house was frigid when we got up in the morning. My wife found Controlling Systems on Yelp and we bought a $75 dollar coupon for $35. I called and the service technician Gus arrived right on time…

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via Yelp
Arie W.

I can't say enough good things about this company, or Gus. He's fantastic, fast, professional, courteous, and what techs should be.

It's the second time I hired Gus to replace a broken ignitor on my older Rheem furnace, and I immediately …

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via Yelp
A Google User

They were very thorough and professional from start to finish.

via Google
A Google User

The guys were on time and did an excellent job. It was A/C #2 for us that's why we came back.

via Google
Ed W.

I continue to be impressed by these guys. I used them this summer for an AC service at my Thornton house and they did a great job. I picked them because of their good yelp reviews and they continue to impress. Just used them for a heating …

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via Yelp
James H.

Can't say enough about these guys! Controlling Systems is an excellent and very professional company who I have had the pleasure of calling to the rescue on 4 occasions now (over the past 12-14 years). This time it was as simple as cleaning…

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via Yelp
Shelley C.

Fixed my issue for a few hundred dollars on a very old furnace instead of taking me for a ride and telling me I need a new one. Awesome service. Respectful and quick!

via Yelp
Lisa M.

We got a furnace tune and inspection from Controlling Systems. They were very friendly and helpful. Well worth the money! We will definitely use them in the future for any furnace needs.

via Yelp
Annie D.

Very professional and courteous. We needed out furnaced tuned up, and although it also needs some repairs we were not pressured to fix it right away. We were told what was wrong and advised that we should start planning to replace the …

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via Yelp
Ryan Stunkel

Here is a honest and professional HVAC company. Last week a competing HVAC company had come out for $29 inspection and told my wife we had a cracked heat exchanger and were leaking gas. That company shut off our furnace and the gas to it …

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via Google
A Google User

The entire process was easy. Staff was very professional.

via Google
Brandon Graham

Controlling Systems provides the best HVAC serivces. They have competitive pricing and I can't recommend them enough. In the past they have handled all my HVAC needs including installation of air conditioning, air cleaner, humidifier, attic…

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via Google
A Google User

I am delighted with the work done by the crew of Kevin, Steve, Ben, and Donnie. They were very punctual and professional for the whole job. They listened to my numerous questions and supplied me with the answers.

via Google
A Google User

These guys are great, as always. Will recommend.

via Google
Fran Seaver

Really liked exhaust/venting for both the furnace and hot water heater. Really cool.

via Google
Mark M.

Sean was awesome, friendly, and pleasant. Cleaned the furnace easy schmeezy.

via Yelp
Jason S.

Controlling Systems was able to come out the same week I called to service both my AC and furnace. Their prices for service are reasonable and the Yelp deal I purchased made it even more affordable. They even replaced the filters for me at …

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via Yelp
James L.

These guys did a new furnace at one property and added central air to a furnace at another location.

Their quotes were right in line with other quotes I had received, and I felt that Brent was a lot more knowledgeable than the people who …

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via Yelp
Amy J.

After purchasing our new house, I had Controlling Systems do our a/c tune up this summer to clean everything out. After a bit of scheduling confusion/delay due to pesky Colorado afternoon t-storms, Brent came out and took care of everything…

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via Yelp
Vanessa C.

I was so scared that I had to have my HVAC system coils completely replaced, because that's really expensive. I didn't have to do that and it was a quick repair... Just a washer! I had my repair done by one of the members of Controlling …

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via Yelp
Leia W.

I was very nervous about picking a company to come look at my AC unit. I know how many places will just rip you off. However, I'm so glad I picked Controlling Systems. Gus was on time and called me beforehand to let me know he was close. He…

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via Yelp
Tom H.

We have used Controlling Systems for a number of years for our heating and A/C systems with good result. Our system had a problem and was difficult to fix. We have an older home with older wiring. After a stumble, Controlling Systems came …

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via Yelp
A Google User

Kevin and Gus were extremely helpful and highly professional. Excellent technicians. Both techs are a fine credit to this company.

via Google
Brandon G.

Controlling Systems provides excellent HVAC installation and support. They have competitive pricing and I can't recommend them enough. In the past they have taken care of all my HVAC needs including installation of air conditioning, air …

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via Yelp
Adam R.

I had a leaking boiler and therefore was without a working heating system. All I knew is that the heat was not working and so I called Controlling Systems based on the reviews on Yelp. Gus came over the day I called and he contacted his …

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via Yelp
Dio Rose

Very good job

via Google
A Google User

I found the service to be excellent. Thank you very much for your professionalsim!

via Google
Blinkonic

These guys were great. Very professional knowledgable and on time. Your company is lucky to have these great employees!

via Google
Robert T.

These guys are professionals. They are small so they might be booked a week or so out but it is well worth the wait. Also, the prices are very competitive. As with the HVAC industry in general the difference in price from one company to the…

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via Yelp
Glefferr

Completed very quickly. Installers showed up right on time.

via Google
A Google User

very professional w/ really good customer service. Ben did a great job!

via Google