What are common signs that my HVAC system needs repair?

Common signs include unusual noises, weak or inconsistent heating or cooling, uneven airflow, frequent cycling, strange odors, and higher-than-normal energy bills.

How often should I have my HVAC system serviced?

Most HVAC systems should be serviced at least once per year. For best performance, many homeowners schedule maintenance twice a year—before the peak cooling and heating seasons.

Can I perform HVAC repairs myself?

You can handle a few basics like replacing filters or checking thermostat settings, but most HVAC repairs should be done by a licensed professional to avoid safety risks and prevent further damage.

What should I do if my HVAC system stops working?

Start by checking thermostat settings, the circuit breaker, and the air filter. If the system still won’t run or isn’t cooling/heating properly, contact a professional technician for diagnosis and repair.

How much does HVAC repair typically cost?

HVAC repair costs vary by the specific issue, parts needed, and system type. Many repairs fall in the $100 to $500 range, though larger repairs can be higher depending on the diagnosis.

What are the benefits of regular HVAC maintenance?

Regular maintenance helps extend system lifespan, improve energy efficiency, maintain consistent comfort, and reduce the risk of unexpected breakdowns and costly repairs.

How do I choose a reputable HVAC repair service?

Look for a licensed, insured company with strong reviews, certified technicians, clear pricing, and warranties or guarantees on workmanship.

Can I trust Sigma Air Heating and Cooling with my HVAC repairs?

Yes. Sigma Air Heating and Cooling has over 30 years of experience providing HVAC repair services in San Antonio. The team is licensed, certified, and insured, so your repairs are handled by qualified professionals.

Do you offer emergency HVAC repair services?

Yes. Emergency HVAC repair is available 24/7. Whether it’s a breakdown during extreme heat or an unexpected issue at night, Sigma Air Heating and Cooling responds quickly so you’re not left waiting for comfort.

How do I know if I’m getting a fair price for HVAC repairs?

Sigma Air Heating and Cooling provides transparent pricing and free estimates, so you know what to expect before work begins. With the Sigma Savings Promise, they’ll beat any written quote by 10% within 30 days.

What sets Sigma Air Heating and Cooling apart from other HVAC service providers in San Antonio?

Sigma Air Heating and Cooling stands out with decades of experience, fast same-day service, and a strong focus on customer satisfaction—backed by a local team that’s licensed, certified, and committed to quality work.

HVAC Repair

HVAC Repair Services In San Antonio, TX

HVAC Care Like Never Before

We know San Antonio’s heat can be brutal on your HVAC, but with Sigma Air Heating & Cooling, you can wave it all away. From clogged filters to electrical malfunctions, our HVAC repair services in San Antonio have been a dependable choice for decades. We pride ourselves on same-day service, so you never have to suffer through another sweltering day. With us, friendly and always reliable services are just a call away!

Comforting Your Homes & Businesses Since 1994

Revive • Restore • Renew

At Sigma Air Heating & Cooling, your homes and businesses should be cozy retreats. With the same ideology, we do not simply repair HVAC systems; we save you money on utility bills, ensure your equipment runs efficiently, and make the environment healthier. Whether it’s reducing allergens or improving air quality, we’ve got you covered.

With our HVAC repair service in San Antonio, TX, you can breathe easy knowing your comfort is in expert hands. With our extensive HVAC repair services, you’ll have a better, healthier home or business. In one call, we promise calm, serenity, and saving, in a nutshell.

Sigma Air Defining Excellence With HVAC Repair Services

At Sigma Air Heating & Cooling, we understand the discomfort of HVAC failures. Whether it’s the scorching heat of summer or the chill of winter, our expert team is here to restore comfort swiftly. We offer same or next-day service with our “Sigma Savings Promise”; we’ll beat any written quote by 10% within 30 days!

Our team is certified, bonded, and insured, providing top-tier residential and commercial HVAC services. We offer free estimates, hassle-free warranty work, and preventive maintenance to save you money in the long term.

Plus, our HVAC service and repair in San Antonio, TX, provides a cutting-edge approach to HVAC management. Trust us for reliable, fast, and affordable HVAC solutions. No surprises, just comfort. Call us for your free estimate today!

What Makes Us a Market Leader?

Since 1994, Sigma Air Heating & Cooling has been San Antonio’s favorite for repairing HVAC units. Here is what you will get in just one call!

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Always-On Emergency Help

We’re here 24/7 because comfort emergencies don’t wait for office hours.

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Decades of Trusted Service

With years of experience under our belts, we’ve earned our reputation as San Antonio’s go-to HVAC experts.

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Licensed, Local, and Reliable

No franchises, no outsourcing. Just fully licensed, certified HVAC professionals who call San Antonio home.

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Fast, Same-Day Service

Need help now? We’re committed to same-day service, getting you back to comfort fast.

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No Surprises, Just Straight Talk

We offer transparent pricing and no-pressure repairs, so you’ll always know what to expect.

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Offers You Can't Resist

From free estimates to 12 months of no payments, we know how to deliver practical discounts.

Need HVAC Repair Services San Antonio, TX? Here’s How to Reach Us

Whether your AC just quit or you’re noticing signs something’s off, our team at Sigma Air is ready to help — fast.

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Call Us:

(210) 610.2332
Speak directly with a local HVAC expert. No call centers. No waiting games.

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Email Us:

info@sigmaairtx.com
Send us your issue, and we’ll get back to you promptly with answers or a scheduled service time.

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Visit Us (By Appointment):

5315 Jackwood Drive, San Antonio, TX 78238

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Request Service Online:

Want to skip the phone call? Schedule service or request a free quote.
We’ll confirm your appointment and be on our way.

Is Your HVAC Unit Feeling the Heat?

Get It Diagnosed And Fixed In Record Time

Even a minor issue with your HVAC system can cause significant discomfort, especially in San Antonio’s intense heat. If something doesn’t feel right, here’s what might be happening:

AC Not Cooling / Weak Airflow

Is your AC running, but your home still feels warm? Chances are, airflow’s the culprit. We’ll quickly clear those obstacles and restore the unit instantly!

Refrigerant Leaks or Low Refrigerant

Low refrigerant levels or leaks can cause your AC to blow lukewarm air. Our expert technicians quickly identify refrigerant issues and prevent costly damage.

Frozen Evaporator Coils / Ice Buildup

In the heat of San Antonio, ice buildup on your evaporator coils is no joke. Our team handles this quickly to get your system back on track.

Electrical & Component Failures

Frequent cycling or electrical issues, such as blown capacitors and tripped breakers, often cause your AC to shut down. Our trained team is ready to tackle any electrical failure and restore reliable cooling.

Clogged Condensate Drains & Moisture Problems

If your condensate drain clogs, water can back up, leak, and damage internal parts. We ensure moisture problems are solved to keep your system running smoothly and your air quality top-notch.

Free Tune-up!