What are the signs that my furnace needs repair?

Signs your furnace may need repair include unusual noises, insufficient or uneven heating, frequent cycling, rising energy bills, or a system that struggles to maintain set temperatures.

How often should I have my furnace serviced?

Furnaces should be professionally serviced at least once per year, ideally before the heating season begins, to ensure safe and reliable operation.

Can I repair my furnace myself?

Homeowners can handle minor tasks like replacing filters, but furnace repairs involving electrical components, gas connections, or internal parts should always be handled by licensed professionals.

What is the average cost of furnace repair?

Furnace repair costs vary based on the issue and required parts. Many repairs range from about $100 to $1,000, though complex issues may cost more.

How long does a furnace repair take?

Most furnace repairs can be completed within 1 to 3 hours. More involved issues may take longer depending on diagnosis and part availability.

What should I do if my furnace won't turn on?

Start by checking thermostat settings, confirming power to the unit, and inspecting the circuit breaker. If the furnace still won’t start, contact a professional technician for service.

How can I prevent future furnace problems with Sigma Air Heating & Cooling?

Sigma Air Heating & Cooling offers preventative maintenance plans designed to keep your furnace running efficiently year-round. Routine inspections help prevent unexpected repairs, extend system lifespan, and improve reliability.

How quickly can Sigma Air Heating & Cooling repair my furnace?

Same-day or next-day furnace repair is available with Sigma Air Heating & Cooling, especially during colder months when fast response is critical for comfort and safety.

Is Sigma Air Heating & Cooling’s furnace repair service cost-effective?

Yes. Sigma Air Heating & Cooling offers transparent, competitive pricing with no hidden fees. Through the Sigma Savings Promise, any written furnace repair quote that is 10% lower within 30 days will be matched.

What types of furnace problems does Sigma Air Heating & Cooling fix?

Sigma Air Heating & Cooling repairs a wide range of furnace issues, including dirty or clogged filters, ignition failures, thermostat malfunctions, blower motor problems, and cracked heat exchangers. Qualified technicians diagnose and repair issues promptly.

Furnace Replacement

Furnace Replacement Services in San Antonio, TX

Comfort That Never Takes a Day Off

Cold house? We understand; winter does not wait, and neither should you. Skip the runaround and get straight to warmth. At Sigma Air, we show up ready, diagnose fast, and replace your furnace without the drama or the upsell. Just honest answers, expert work, and heat back where it belongs. San Antonio trusts our furnace replacement services in San Antonio, TX, because we fix problems, not excuses.

The Trusted Choice for Furnace Replacement in San Antonio

Replace. Restore. Relax.

At Sigma Air Heating & Cooling, we don’t just swap out old furnaces; we upgrade your entire winter experience. Our expert technicians bring precision, speed, and zero hassle to every furnace replacement in San Antonio, TX. Whether it’s your home or business, we install systems built for comfort, efficiency, and years of reliable warmth.

We’re not here to sell you extras. We’re here to solve your heating problem right the first time. Trust San Antonio’s go-to team for furnace replacements that actually work, and warranties that back it up.

Built on Trust. Backed by 30+ Years. Right Here in San Antonio.

Since 1994, Sigma Air Heating & Cooling has come a long way in delivering comfort to homes and businesses. San Antonio deserves the precision, speed, and honesty we’ve delivered to developers for three decades. From Helotes to Alamo Heights, Boerne to Stone Oak, you get the full Sigma treatment.

With same-day or next-day service, the Sigma Saving Promise, and the offer to beat any quote by 10% (30-day guarantee), our team goes above and beyond to make your home pleasant and livable again.

We are not your typical team; we guarantee that Sigma Air Heating & Cooling deliver results.

San Antonio, TX Furnace Replacement Services — Choosing the Best Made Simple

You don’t need lazy excuses; you need furnace replacement service in San Antonio, TX that is built to last at least a decade. We solve cold-house problems fast, fairly, and with zero fluff.

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We Answer. Always

The furnace died at 2 AM? We’re already on our way. Cold doesn’t take nights off, and neither do we.

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No Hidden Fees

You get one price. Upfront. In writing. What we quote is what you pay, no gotchas, no “oh by the way” fees.

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Pros You Can Trust

Licensed. Certified. Background-checked. We don’t send rookies to handle your heating.

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Zero Pressure

We lay out your choices, explain what actually matters, then step back. Your call. Your home. Your comfort.

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Systems Built to Standout

We install furnaces that work, not just today, but for years—backed by real warranties and our 30+ year reputation.

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Preventive Maintenance

Our maintenance plans don’t just prevent breakdowns; they keep your furnace running smoothly for years.

Need Furnace repair in San Antonio, TX? Here’s How to Reach Us

Need fast furnace repair in San Antonio? Call now for expert diagnostics, reliable fixes, and warm comfort restored without delay.

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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 Furnace Failing Again And Again?

Here’s What’s Wrong and What We’ll Do About It

Even a minor furnace issue can leave your home freezing fast. If something feels off, here’s what’s likely happening, and how our furnace replacement experts in San Antonio, TX, solve it:

Your Heat Keeps Cutting Out

Short-cycling from dirty filters, blocked vents, or faulty limit switches? We clear the airflow, replace worn parts, and restore steady, reliable heat.

You Smell Gas or Sense Danger

Cracked heat exchanger? That’s a carbon monoxide risk. We shut it down, assess the damage, and replace your furnace safely, no shortcuts.

The Last Company Did a Terrible Job

Bad install from a cheap contractor? We assess the damage, explain your options honestly, and replace your system the right way, with proper sizing, clean work, and a warranty that matters.

It Won't Turn On at All.

Failed ignitor or blown capacitor? We diagnose quickly and replace the faulty component so your furnace fires up like new.

Electrical Problems Keep Popping Up

Loose wiring, bad transformers, blown fuses? Our certified techs trace the issue, repair the electrical system, and prevent future failures.

Quick Answers to Common Questions

Can You Help If My Old Furnace Was the Wrong Size for My Home?

Yes, and this happens more often than you would imagine. Small furnaces struggle to keep up, and large ones start short-cycling and wasting energy. Before we install anything, we perform a proper load calculation based on your home’s square footage, insulation, windows, and layout. This will ensure that your new furnace is sized properly to deliver the most efficient, even heat and be long-lasting.

What Brands Do You Install, and Does It Even Matter?

Our brands include trusted names such as Carrier, Trane, Lennox, and Rheem, each offering strong warranties. A high-quality furnace would last a long time. An installed mid-tier system will last 15+ years. We focus on both: quality equipment and perfect installation.

What If My Furnace Breaks Down in the Middle of Winter? How Fast Can You Replace It?

We provide same-day or next-day furnace replacement during an emergency. In cold weather, when your heat stops, we will take a faster route to a warm house. We have our stock of popular furnace models fulfilling our install crews’ needs, without cutting corners. Call us, and we will have a plan (and a timeline) within the hour.

Will a New Furnace Really Lower My Energy Bills?

Absolutely. Old furnaces (15-20+ years old) can burn 30-40 percent of the fuel. The current high-efficiency furnaces utilize 95%+ of their energy to heat your home, not your attic or the outside. We will present you with the efficiency ratings and the estimated savings upfront so you know what to expect.

Free Tune-up!