HVAC reviews in Katy, Texas

Joseph is truly a gentleman, very honest and give fair price on any AC/Heating job.
My heating went out, I called him and he shows up in heavy rain and fix my problem.
I definitely recommend him.

I only called to inquire about a problem I have with my thermostat, so I called Cornerstone and spoke to Joseph, he advised what I should do to save money and fix the issue. Followed his recommendation and my thermostat was working next day - he even texted me next day to do a follow up - this is what I call five start service - you are definitely on my speed dial for my AC and Heating services

Great communication, same day service, explains what’s needed. Used company twice and great experience both times getting the ac back up and running. Thank you.

I called, and Joseph was at my house in less than 30 minutes. After looking at the system and telling me what he thought, he had the part and had the ac back up and running within an hour. Could not be any happier! These guys have become my new AC repair company. Thanks again, Joseph!

Great work fast and efficient, would highly racommend

Immediate customer service over the phone and was readily available to answer any questions. Arrived at my house 20min. after the initial phone call and provided excellent and honest service. Highly recommended and will definitely use again. Thanks!

Joseph with Cornerstone AC & Heat LLC always does a great job for us and has installed 2 new AC systems and keeps our AC and furnace systems working well!
He also advises us on new technologies and equipment that can help purify the air in our home and installed an air purification system.
Joseph is very thorough and he always does a great job!

This company was very resourceful. Talked me through some trouble shooting before coming out. Jospeh gave exceptional service and prices were very fair. I would recommend to anyone 10/10. Very communicative!

My a/с didn’t cool ,I called this company and on the same day a technician came to me, at a time convenient for me.He arrived on time,checked everything professionally, determined the breakdown and fixed everything quickly. He helped me understand something about good work of my a/c ,checked everything and made sure that everything works good,only then left my house.
Very polite, friendly and honest. Thank you for great service,I highly recommend this company

I have used Cornerstone for many years. I find them to be very Trustworthy, Skilled and Reliable. I have never had an issue with any of the work performed at my home or any of my rental properties. I highly recommend the Company!

Great work. Joseph does a fantastic job. Very detail oriented and goes the extra moke to make certain the work is as perfect as possible. Highly highly recommended

I've been using Cornerstone AC & Heat for 20 years. They do excellent work and have fair prices and I feel they are honest and dependable.

Cornerstone install our AC and have serviced it ever since. Joseph is a great representative of professionalism. We recommend him 100 percent. Thanks Joseph

We had a wonderful experience with Joseph & the Cornerstone team! Joseph was able to come out the day I called, was very professional and personable, and his pricing was fair. He got the repairs done within two days, and we’re super happy with the service! We’ll definitely reach out to him if we ever need help again in the future. 10/10 recommend!

Joseph is an incredible and very knowledgeable Technician. Every time I need him for repair, he is always a text or call away. He is very great at explaining the problems, and is just as quick at finding the solution! Would highly recommend! He has assisted several times on repairs and is proficient every time!

I highly recommend Cornerstine AC. They have been out at several properties we own and always very professional and honest. Truly cares about his customers😁

Joseph with Cornerstone has been taking care of my units for more years than I can remember. He is so kind and informative with everything he does. Joseph you are the best! Thanks!

Amazing speed, fantastic communication, excellent work. We have used Cornerstone for the past 15+ years and they have always given excellent service. Thank you.

My experience was very pleasant. Joseph was timely, knowledgeable, communicative, and respectful. I walked away from our interaction feeling like I made the right decision because at times, finding the right help can be challenging. I will definitely recommend this company to family and friends.

Joseph was prompt, courteous, honest and he fixed the problem. I also appreciate that he kept in contact with me and gave me updates. Also, he was able to send a pay invoice through text messaging and that was very convenient.
Joseph is a very nice guy.

Cornerstone AC & Heat absolutely saved us. They showed up after hours on Saturday evening and worked all evening to repair our furnace just in time before a major freeze hit Houston. We are incredibly grateful for their dedication and would highly recommend them to anyone needing reliable, trustworthy service—especially in an emergency. THANK YOU!!