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About
About Sigma Air, A Legacy of Excellence:
At the heart of Sigma Air Heating & Cooling is a story of perseverance, vision, and the pursuit of building something bigger than just a business—it’s about building trust, comfort, and community. Founded in 1994, Sigma Air Heating & Cooling began as a small, family-led venture in San Antonio, Texas. Over the years, it has grown into one of the most respected HVAC providers across the state, specializing in residential, multifamily, and commercial HVAC solutions.
For decades, Sigma Air Heating & Cooling has led the way in HVAC excellence. Now, we’re bringing that same quality and commitment to homeowners across Greater San Antonio. Whether you’re dealing with a broken AC, looking to upgrade your system, or need fast emergency help, we’ve got your home covered.
Let’s Bring Comfort Home!
Just bring us a written quote from a reputable, licensed company within the last 30 days, and we will beat the quote for new equipment installations or complete new HVAC system installations. *Cannot be combined with other offers*.
Simply make an appointment by clicking the button below and one of our staff members will reach out on how to save you money!
Overview
Current Top Pro
Hired 219 times
Serves San Antonio, TX
Background checked
License verified
27 employees
32 years in business
Business hours
Sun9:00 am - 3:00 pmMon7:00 am - 6:00 pm
Payment methods
This pro accepts payments via Apple Pay, Cash, Credit card, Venmo, and Zelle.
Customers rated this pro highly for work quality, professionalism, and responsiveness.
Excellent 4.9
138 reviews
5
95%
4
1%
3
0%
2
1%
1
3%
Your trust means everything to us. Learn about our review guidelines.
Read reviews that mention:
Christie R.
Aug 18, 2026
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Hired on Thumbtack
the man at Sigma air are amazing but they haven't fixed my airconditioning yet it's still not working to correct way I think I need a different unit we're not sure what's going on it's not cooling in the afternoon please come out and see what you can do and you take care of it
Details: Install a new A/C unit • As recommended by the professional • I need the professional to purchase the unit • Attic • Ground floor • 2,000 - 3,000 sq ft • One story • House • Owner
Sigma Air Heating & Cooling's reply
Christie Rochelle UPDATE:
I have to say I was really surprised by how everybody responded so quickly and they reacted to what we needed to have done yes we had to go through five different companies to get to Sigma and make things right and they had to send this the company out three times to make it right but they did make it right and they were wonderful Robert was wonderful Ronnie was great very personable very professional did their job David the final guy that came out today checked everything and spent two and a half hours doing everything he could to make sure that our air conditioning was running properly I have to say that Sigma air is top quality 100% the best trustworthy company that you can buy and go through in my books and I have gone through a lot this week and they are 100% the best I have to say that one more time if you're going to do air conditioning go through Sigma air you cannot do wrong they get a five plus on my book thank you guys so very much for doing a great job and being a man of your words and doing the job sincerely David and Christie Rochelle.
From Sigma:
Thank you, David and Christie Rochelle, for sharing such an incredible and heartfelt review! We truly appreciate you giving Sigma Air Heating & Cooling the opportunity to make things right. We know how frustrating it can be when an HVAC issue requires multiple visits, and we’re grateful for your patience while our team worked through everything with you.
We’re especially thankful for your kind words about Robert, Ronnie, and David. It’s wonderful to hear that each technician demonstrated professionalism, personal attention, and a genuine commitment to getting your air conditioning system operating properly. David spending over two hours thoroughly checking the system and making sure everything was working as it should is exactly the level of dedication we want our customers to receive.
At Sigma Air Heating & Cooling, we provide AC repair, central air conditioning repair, HVAC system troubleshooting, air conditioning maintenance, cooling system repair, AC diagnostics, HVAC service, and residential heating and cooling throughout San Antonio, TX. Most importantly, we believe in standing behind our work and doing everything we can to earn our customers' trust.
Your “five plus” rating means a tremendous amount to our entire team. Thank you for choosing Sigma Air, for giving us the opportunity to make things right, and for recommending us to others looking for a trustworthy HVAC company in San Antonio. We’re honored to have your confidence!
— Sigma Air Heating & Cooling | San Antonio's Trusted AC Repair & HVAC Service Team
Central Air Conditioning Installation or Replacement
Michael D.
Aug 11, 2026
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Hired on Thumbtack
Sigma responded quickly and had no issue with installing equipment that I had purchased from a third party.
The technicians arrived promptly for the appointment and gave me a more than fair quote for the replacement of the condenser unit and the cased coil and immediately went to work.
it took a bit longer than originally anticipated, mainly due to the need to run a communications cable from the air handler to the condenser unit.
The only slight issue that I encountered was the lack of proper sealing of the holes in the case of the cased coil for the copper lines and for the drain pipe. I did that myself with some foil tape and sealing compound.
I highly recommend Sigma for your HVAC projects.
Details: Replace an existing A/C unit • Split system • I already have the A/C unit • Closet • Ground floor • 1,000 - 2,000 sq ft • One story • House • Owner
Sigma Air Heating & Cooling's reply
Thank you, Michael, for the outstanding 5-star review! We truly appreciate you choosing **Sigma Air Heating & Cooling** for your central air conditioning replacement in San Antonio. Our team is committed to providing prompt service, fair HVAC installation pricing, and dependable workmanship—even when customers supply their own equipment.
We’re glad our technicians could help with your **condenser replacement, cased coil installation, air handler connection, and HVAC system installation**. Your feedback is valuable, and we’ll use it to continue improving the finishing details of every project.
If you’re searching for a **trusted HVAC company in San Antonio, TX** for **AC installation, central air conditioning replacement, air conditioner repair, HVAC replacement, cooling services, heating services, or professional HVAC installation**, Sigma Air Heating & Cooling is here to help. Thank you again for recommending our San Antonio HVAC team!
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Central Air Conditioning Installation or Replacement
Melissa K.
Jun 6, 2026
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Hired on Thumbtack
I discovered my AC stopped working right after the Spurs lost game 2. I was already warm but the temperatures kept rising. Meanwhile, the animals were getting upset, and my son‘s leg cast was starting to develop moisture from sweat. I don’t think any of us slept, but we are now cooling down!
David popped in and out in less than an hour. Oh, and he was like five or six hours early! 🙏
If you want to try them out, I have a little referral thing where you get 50 off and I get 50 off. I don’t know if you can message me on here but I think you can.
Details: Repair • Unit won't turn on or off • The power is on, but the fan won't run • Attic • Outside • House • Owner
Sigma Air Heating & Cooling's reply
Thank you for the great review, Melissa! We’re so glad you had a positive experience with Sigma Air Heating & Cooling. Providing fast, affordable, and dependable HVAC repair and maintenance service is what our team is all about.
We’re happy to hear David took the time to explain everything clearly and made the process easy to understand. Whether it’s diagnosing an A/C issue, performing HVAC maintenance, or improving system performance, we believe homeowners should always feel informed and confident about the work being done.
Thank you again for choosing Sigma Air Heating & Cooling for your heating and air conditioning needs. We truly appreciate your support and look forward to helping keep your HVAC system running efficiently year-round!
Central Air Conditioning Repair or Maintenance
Mike V.
Aug 4, 2026
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Hired on Thumbtack
Great company, great price 10% military discount. They fixed the A/C system to our house quick and did it the right way!
Thank you, Mike, for your kind words and for your service! We’re honored to provide our military discount and are thrilled to hear you were happy with the quality of our work. At Sigma Air Heating & Cooling, our goal is to deliver dependable AC repair and HVAC services in San Antonio, Texas with honest pricing and lasting solutions. We truly appreciate your trust and recommendation, and we’re here whenever you need air conditioning repair, HVAC maintenance, or heating and cooling services in San Antonio, TX. Thanks again for choosing our team!
Central Air Conditioning Repair or Maintenance
Jack F.
Sep 8, 2026
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Hired on Thumbtack
Sigma accurately diagnosed my AC problem after another company I did not call arrived earlier and told me my repair would cost me less than $1,000, because I needed refrigerant. Sigma discovered I only needed a new coil. Fortunately, I had sent the other company away. I found Sigma professional, courtious, and trustworthy.
Details: Repair • Outside • House • Owner
Sigma Air Heating & Cooling's reply
Thank you, Jack, for sharing such a thoughtful and detailed 5-star review! We truly appreciate you trusting Sigma Air Heating & Cooling to diagnose your central air conditioning problem.
Accurate HVAC diagnostics are extremely important, and we’re glad our technician took the time to properly evaluate your system and identify that the issue was a failed AC coil rather than simply recommending an expensive refrigerant charge. We believe homeowners deserve honest recommendations, clear explanations, and repairs based on what their HVAC system actually needs.
At Sigma Air Heating & Cooling, we provide AC repair, central air conditioning repair, evaporator coil replacement, refrigerant leak diagnosis, HVAC troubleshooting, air conditioning maintenance, AC system repair, and complete residential HVAC services in San Antonio, TX.
Thank you for recognizing our team as professional, courteous, and trustworthy. Those are qualities we work hard to maintain with every service call. We’re grateful you chose Sigma Air and appreciate your confidence in our San Antonio HVAC repair team!
— Sigma Air Heating & Cooling | San Antonio AC Repair & HVAC Services
Central Air Conditioning Repair or Maintenance
FAQs
What should the customer know about your pricing (e.g., discounts, fees)?
Let’s Bring Comfort Home!
Just bring us a written quote from a reputable, licensed company within the last 30 days, and we’ll beat their quote for new equipment installations or complete new HVAC system installations. Cannot be combined with other offers.
Simply make an appointment by clicking the button below and one of our staff members will reach out on how to save you money!
What is your typical process for working with a new customer?
We introduce ourselves, how long we have been in business, and the services we offer. We then ask the customer what service they are looking for. Most services can be quoted over the phone, but we always prefer to meet the customer in person so we can show them what we are recommending and why. We want customers to see with their own eyes so there is no questions or doubts later.
What advice would you give a customer looking to hire a provider in your area of work?
Check reviews and how long they have been in business. Also, make sure they are licensed by the state of Texas.
