Furnace Repair Service in San Antonio, TX
Fast, Reliable Furnace Repair for All Makes & Models - 24/7 Emergency Service
Call for Furnace RepairWhy Choose A-OK for Furnace Repair
Same-Day Service
Most furnace repairs completed same day - we know you can't wait in the cold
All Brands Serviced
Carrier, Trane, Lennox, Goodman, Rheem, American Standard, and more
Honest Diagnostics
Clear pricing before we start - never upsell you on unnecessary repairs
Guaranteed Repairs
All furnace repairs backed by our workmanship warranty
Professional Furnace Repair You Can Trust
When your furnace breaks down on a cold San Antonio night, you need fast, reliable repair service. Our certified HVAC technicians diagnose and fix furnace issues quickly, from ignition failures and blower motor problems to cracked heat exchangers and gas valve issues. We service all major furnace brands and models, ensuring your home stays warm and comfortable.
With our TACLA29221C license and 24/7 emergency availability, we're the trusted choice for furnace repair throughout San Antonio and surrounding areas. Our fully-equipped service vans carry common replacement parts to minimize downtime and restore your heat on the first visit whenever possible.
Financing Options Available!
0% Interest on HVAC Systems
We make HVAC repairs and replacements affordable with flexible payment plans and 0% interest financing options.
- ✓Flexible payment plans available
- ✓Same-day approval in many cases
- ✓No prepayment penalties
Disclaimer: Subject to credit approval. Terms and conditions apply. Call (210) 501-9445 to see if you qualify and learn more about available financing options.
Fast Emergency Furnace Repair
Our fully-equipped service vans arrive at your door with the tools and parts needed to diagnose and repair most furnace problems on the first visit. We stock common components like ignitors, flame sensors, blower motors, and capacitors to minimize downtime and get your heat back on fast.
Furnace Not Working? Call Now for Emergency Repair
Don't spend another night in the cold. Our technicians are standing by 24/7 to restore your heat.
Call for Emergency Service
Commercial Furnace & Rooftop Unit Service
From small businesses to large commercial buildings, we service all types of commercial heating systems including rooftop units (RTUs), package units, and commercial furnaces. Our technicians are trained on commercial HVAC systems and understand the urgency of keeping your business comfortable.
Furnace Repair for San Antonio's Winter Needs
While San Antonio winters are mild compared to northern states, we still experience cold snaps where temperatures drop into the 20s and 30s. When your furnace fails during these periods, it's more than uncomfortable—it can be dangerous, especially for elderly family members, young children, and pets.
Our furnace repair service is specifically designed for San Antonio homeowners. We understand that many homes here have furnaces that sit unused for months, making them prone to ignition problems, dirty pilot lights, and seized blower motors when winter arrives. We stock parts for the most common San Antonio furnace issues and offer preventive maintenance to catch problems before cold weather hits. Best time to schedule furnace service? October—before the first cold front.
Complete Furnace Diagnostics
We perform thorough diagnostics to identify the root cause of furnace failures. Our testing includes thermostat verification, electrical component testing, gas pressure measurement, heat exchanger inspection, airflow assessment, and safety control verification. You'll know exactly what's wrong before we begin repairs.
Filter Replacement & Maintenance
During every repair visit, we inspect and replace dirty air filters that restrict airflow and force your furnace to work harder. Regular filter changes prevent 80% of furnace breakdowns and extend system life. We'll also clean blower components and ensure proper airflow throughout your system.
Complete Furnace Repair Guide
Most Common Furnace Repairs in San Antonio
The most frequent furnace problems we encounter: Ignitor Failure - Electronic ignitors wear out after 5-7 years and fail to light the gas burner (repair cost $150-300). Flame Sensor Issues - Dirty or failed flame sensors shut down the furnace as a safety measure (cleaning/replacement $100-250). Blower Motor Problems - Motors that seize or run slowly reduce airflow and heating capacity (repair $200-600). Thermostat Malfunctions - Incorrect thermostat settings or failures prevent proper furnace operation (repair/replacement $100-350). Gas Valve Failures - Less common but critical, gas valve issues prevent fuel from reaching the burner (replacement $300-600).
When to Repair vs. Replace Your Furnace
The key decision factors: System Age - Furnaces under 10 years old are almost always worth repairing; those 15+ years old should be evaluated carefully. Repair Cost - If the repair costs more than 50% of replacement value, consider replacement. Energy Efficiency - Older furnaces run at 60-70% AFUE while new models achieve 95%+ efficiency, saving hundreds annually. Frequency of Repairs - If you're calling for repairs every year, replacement makes more financial sense. Heat Exchanger Cracks - This is a safety issue requiring immediate replacement. Our technicians provide honest assessments and never push unnecessary replacements.
Emergency Furnace Repair Process
When you call for emergency furnace repair: Step 1 - Immediate Response - We dispatch the nearest available technician, typically arriving within 2-4 hours for true emergencies. Step 2 - Safety Check - First priority is ensuring no carbon monoxide leaks or gas safety hazards. Step 3 - Diagnostic Testing - Complete system diagnostics using specialized tools to pinpoint the exact failure point. Step 4 - Repair Options - We present clear options with costs before beginning work. Step 5 - Repair & Testing - Most repairs completed same visit; we test system operation and safety controls before leaving. Step 6 - Prevention Tips - We provide guidance on preventing future failures.
Schedule Furnace Repair or Diagnostic
Get expert diagnosis and repair for any furnace problem. Same-day service available.
Schedule RepairResidential Furnace Installation & Replacement
When repairs don't make economic sense, we offer furnace replacement services. Our technicians install high-efficiency furnaces in homes throughout San Antonio, including tight-space installations in closets, attics, and garages. We handle all permits, inspections, and warranty registration.
Smart Thermostat Integration
Upgrade your furnace with a smart thermostat during your repair visit. We install and configure Nest, Honeywell, Ecobee, and other smart thermostats that improve comfort, reduce energy costs, and alert you to furnace problems before they become emergencies.
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Furnace Repair Service Areas
Our Furnace Repair team serves homes and businesses throughout South Texas. From 24-hour emergency repairs to scheduled installations, we're here for you.
Service areas: Furnace Repair in San Antonio, Furnace Repair in Elmendorf, Furnace Repair in Von Ormy, Furnace Repair in Windcrest, Furnace Repair in China Grove, Furnace Repair in Losoya, Furnace Repair in Sayers, Furnace Repair in Kicaster, Furnace Repair in Martinez, Furnace Repair in Saspamco, Furnace Repair in Calaveras, Furnace Repair in Balcones Heights, Furnace Repair in Boldtville, Furnace Repair in Sandy Oaks, Furnace Repair in Floresville, Furnace Repair in Pecan Valley, and Furnace Repair in Southton.
Call us at (210) 501-9445 for same-day service in your area.
Furnace Repair FAQs
How much does furnace repair cost in San Antonio?
Most furnace repairs in San Antonio range from $150-600 depending on the issue. Simple fixes like replacing an ignitor or cleaning a flame sensor cost $150-300, while blower motor or control board replacements run $300-600. We provide upfront pricing before starting any work—no surprise charges.
What are the signs my furnace needs repair?
Common warning signs include: furnace won't turn on or cycles on/off frequently, blowing cold or lukewarm air instead of hot air, strange noises (banging, squealing, rumbling), unusual odors (burning smell or gas odor), yellow pilot light instead of blue, increased energy bills, or uneven heating throughout your home. If you notice any of these issues, call for diagnostics.
How long does furnace repair take?
Most furnace repairs are completed in 1-3 hours. Simple fixes like ignitor or flame sensor replacement take 30-60 minutes. More complex repairs like blower motor replacement or control board issues may take 2-3 hours. We stock common parts on our trucks to avoid delays. If a special-order part is needed, we'll provide temporary solutions when possible.
Do you offer emergency furnace repair in San Antonio?
Yes! We provide 24/7 emergency furnace repair service throughout San Antonio and surrounding areas. When your heat goes out on a cold night, call (210) 501-9445 and we'll dispatch a technician immediately. Emergency service is typically 2-4 hours response time, and we stock common repair parts to fix most issues same-visit.
What brands of furnaces do you repair?
We service all major furnace brands including Carrier, Trane, Lennox, Goodman, Rheem, Ruud, American Standard, York, Coleman, Amana, Bryant, Heil, Payne, and more. Our technicians receive ongoing training on both legacy systems and new high-efficiency models. Regardless of your furnace brand or age, we have the expertise to diagnose and repair it.
Should I repair or replace my old furnace?
Generally, furnaces under 10 years old are worth repairing unless the damage is extensive (like a cracked heat exchanger). For systems 15+ years old, replacement often makes more sense, especially if repair costs exceed $500-750 or you're making frequent repairs. New high-efficiency furnaces (95%+ AFUE) save 30-40% on heating costs compared to older 60-70% AFUE models. We'll provide honest guidance based on your specific situation—we never push unnecessary replacements.
Is a furnace repair covered by my home warranty?
Many home warranties cover furnace repairs, but coverage varies by policy. We work with most major home warranty companies including American Home Shield, Choice Home Warranty, First American, and Select Home Warranty. Call your warranty company first to file a claim, then schedule service with us. We handle the paperwork and billing directly with your warranty provider.
Can you repair my furnace if it's still under manufacturer warranty?
Absolutely. We are authorized service providers for most major furnace manufacturers. If your furnace is under warranty, manufacturer-defective parts are typically covered at no cost—you only pay for labor. Bring your warranty documentation and we'll handle the parts claim process. Note: Many manufacturers require professional installation and annual maintenance to keep warranties valid.
Request Furnace Repair Service
Fill out this form and we'll contact you within 24 hours to schedule your repair. For emergency service, call (210) 501-9445 immediately.
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Visit Our Elmendorf Location
A-OK SERVICES LLC
17812 I-37, Elmendorf, TX 78112
Open 24 Hours | License: TACLA29221C