HVAC reviews in Plano, Texas

Super impressed! Our AC was out and Cornerstone came out super fast and got us up and cooling the same day!

Dak was great, professional and friendly - didn't try to sell on anything that we didn't need. Thanks Dak

Dak with Cornerstone was very professional, knowledgeable, responsive and fixed our problem quickly. Great job!

Cornerstone serviced out A/C system today. They were kind, professional, and knowledgeable. Highly recommend!

Clayton and Dak helped me out big time! Had a condensation problem and they showed up and got me fixed up in a very quick time frame!

Excellent service! They were very thorough with their inspection on my 24 year old system. They gave me multiple options on a complete system replacement and all options were priced fairly. Highly recommend using this company for your HVAC needs!

Have never had such a quick response in service and taking great care of the A/C issue. Clayton T. was great to work with on this call. Their service is top notch and experience is as well.

Called them on a Tuesday afternoon and they were at my house by Wednesday afternoon. Quickly diagnose the problem made the repair and the entire experience was. A good one.

Clayton was great! Did what he said, on schedule and budget.

Thank you for fixing my AC issues so quickly and efficiently! I appreciate being given options on how to repair the unit and a thorough explanation of the pros and cons of each option. It’s great to know you are a company I can trust to be honest and not just do what is best for your wallet! Great service, professional crew and job well done!

We have been so pleased with cornerstone air. Owners Dak and Clayton are knowledgeable, professional and seek the best for their clients. We will be calling them again when need arises!

Always on time, take great care of both my units. ❤️🙏
Also installed uv lights.

Clayton and his team were great. We had a 20 year old system go out and they were able to get a new system installed the next day in the middle of summer. Fair on price and great service. Highly recommend.

Recently had a AC unit go out and Cornerstone had it handled from diagnostic to new unit installed in 24 hours after a failed attempt from a previous provider. Experience, Expertise and handling your business matters. Dak and his team crushed this project and provided great value on the new unit as well..

I highly recommend Cornerstone Air. We had an issue with our ac not working properly. They had it diagnosed and repaired quickly. Great communication throughout the process.

Cornerstone air is great company they were recommended to me when my previous a/c company that I had been with for a decade could not trouble shoot my ac problem they caused. I paid cornerstones service fee and he gave me some options and one was to replace my defrost board my self since i need to save money for a whole system. I took his advice and now my ac works again. In the fall when we have the money saved for a new unit they will definitely be my new AC company going forward.
Thank you for help.

Dak always goes above and beyond, appreciate him taking care me will always be my air conditioning person

Cornerstone was an absolutely fantastic experience!! Clayton was very professional, knowledgeable, detailed and provided outstanding service to our home. Requesting an appointment for maintenance and had us taken care of! Quality staff, quality service and affordable prices!! 10 out of 10 and will be a lifetime customer!

Clayton and the team at Cornerstone Air did a tremendous job for us when one of our old AC units froze up and was leaking. Clayton came out the same day and assessed the situation.

Although the news wasn't great, and we were going to need a new unit, he took the time to explain and provide options and recommendations. He also checked on our second unit and determined that it was working well. While on-site, he called his supplier and verified the pricing/availability, and we scheduled an appointment for installation.

Clayton kept us up to date with the status and had his team out for installation exactly as scheduled. As it had been raining earlier, they were courteous to keep all work areas clean and used a hand truck when they were replacing the outdoor unit so as to not leave ruts in the yard.

I highly recommend Cornerstone Air as a company you can trust to be honest, fair, and do excellent work.

We had such a great experience with Cornerstone Air today! We had the opportunity to meet Dak Jones, the founder. He was very friendly, professional, on time and thorough. We also admired the fact that he was very honest with us. We are in the process of selling our home in Frisco and we just wanted to have a peace of mind that everything was operating properly and Dak definitely put our minds at ease! We will definitely use Cornerstone Air again for our new home! Thank you Dak and to his team!

AC wasn’t cooling, so we called and Clayton arrived within a couple of hours—on a Friday afternoon. He quickly diagnosed and fixed the issue. Clayton originally installed our system, and it was reassuring to see both him and Dak still supporting it. They’re friendly, professional, and clearly know their stuff. In a market where trustworthy HVAC techs are rare, Dak and Clayton are the gold standard!! Cornerstone Air is my go to for all things HVAC. Highest recommendations!!