HVAC reviews in Katy, Texas

Joseph is the very best I’m sure I would have died if not for him saving me twice already
Thank you

Mike and Joseph worked long hours and successfully found what the prior A/C system installers forgot - to properly ground the system. This year, Joseph came out and checked the A/C - which was operating heroically during our 100+ degree months!

Great work by Joseph. Very professional.
I would highly recommend this company for any AC / Heat fixes.

Excellent Service. We are very happy with Cornerstone AC & Heat, who was referred to us by a longtime resident of our neighborhood.

Very thankful for cormerstone ac and Joseph reaching out to help me even after hours on next door then being able to come by super early and fixed the issue!!!! Fairly priced and so nice. Ac is everything here in texas!! Thank you so much!!

Super trust worthy and goes the extra mile to make sure our air conditioning system was fixed correctly.

Quick and friendly service, even on a hot and humid Sunday evening when my AC went out. Problem resolved within hours. Highly recommend Joseph.

I’ve used Cornerstone for decades and they are always top notch! Honest and reliable service for A/C & Heating!

Great service. Will be using again for sure. Joesph came and did an outstanding job.

We called and within 1 day we had our technician Joseph come out and repair the problem. Great service and always dependable. Thank you Cornerstone.

I replace my AC system moving from R22 to R410, Work was completed in 1 day. Employees very professional. I've been using this company since 2005. Excellent service.

Great service. They came out the same day I requested services and they were very detailed in explaining the issues with my system. I recommend their services.

Highly recommend coming here for your AC services/issues. Joesph was very friendly and provided great service and price with troubleshooting and fixing my AC. Even provided improvements recommendations for easier maintenance.

Joseph is very attentive and professional, explained the reason of my A/C failure in a very easy and understandable way.

Great customer service. Repaired my A/C system the same day. Technician Joseph was very courteous and professional. Will recommend to friends and family. Definitely will be calling back for any A/C issues and maintenance.

Joseph at A/C & Heat Cornerstone installed an Easystart for my AC. He did a good job with a reasonable price. I would recommend anyone who needs A/C work.

We have used Cornerstone for more than 20 years.
They are very honest, dependable, and most important reliable.
About a month ago I called Joseph in a panic on a Saturday when it was over 100 and our AC went out.
He was at our house that afternoon and had the system back up and running soon after. He also let us know that what he repaired was a warranty part and would process the claim for us.
We highly recommend Cornerstone for all you’re repairs and maintenance!

I had heater issue and called Joseph to come to take a look at the issue. In no time he was able to fix it and explain to issue to me. He has earned my trust. If I need any work to be done on my AC/Heater, I will reach out to him in the future.

I highly recommend Cornerstone AC abd Heating. Our family have been their client for many years. They are experts in their field, very honest, never try to make a quick buck because of high demand. Few days ago my AC stopped working. Joseph was at my house the same morning! Problem was fixed right away. Luckily (or is it him being resourceful) he had spare parts in his truck. Personally, Joseph is a very nice person, very polite, knowledgeable and professional.

My HVAC system malfunctioned, and Joseph responded promptly, arriving within an hour on a Saturday night. He efficiently diagnosed and repaired a faulty relay, demonstrating professionalism in both communication and workmanship. The service was provided at a fair price and I will certainly rely on them again for any future HVAC issues.

We have use Cornerstone AC & Heating for the past 9 years. We had a problem and called and seed service on Sunday. They were very reasonable, on time, quick diagnosis and very professional. Joseph stayed and helped program our new EcoBee thermostat that he installed. I highly recommend Cornerstone AC all you needs. Fantastic company.