Furnace & heating
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GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable Furnace Repair Across San Antonio
Furnace repair in San Antonio typically runs $150 – $700, and most calls we handle are diagnosed and fixed the same day. When your heat goes out during one of those rare but bitter cold snaps that catch San Antonio off guard, you need a technician who knows the difference between a flooded condenser in a low-lying Leon Valley subdivision and a rusted heat exchanger in a 1940s Monte Vista bungalow. Brandt HVAC Co San Antonio answers the phone with a live person 24/7 and sends a background-checked, uniformed technician to your door with a written price before any work starts. Call (361) 470-8872 and you’ll know exactly who’s coming and what it’ll cost.
Why Brandt HVAC Co San Antonio Is San Antonio’s Preferred Furnace Repair Company
San Antonio homeowners don’t just want a fix. They want to know who’s in their house. Every Brandt technician is background-checked and identity-verified under the Threshold Verified standard, and we send you the tech’s name and photo before they arrive. If anyone shows up who you weren’t told to expect, that visit is on us. Devin Marlowe runs this location with a simple rule: no work begins until you’ve seen and agreed to a written price.
Our techs live and work in San Antonio. They know the difference between a furnace in a Stone Oak attic and one in a King William closet. They’ve seen hail-pitted condenser fins on the northwest side and know how spring oak pollen clogs coils in Alamo Heights. That local knowledge means faster diagnosis and fewer return trips. And every repair carries a written guarantee. If it fails within 365 days, we come back free under our 365-Day Done Right Promise.
When you search for Furnace Repair in San Antonio, you’ll find plenty of names. What you won’t find everywhere is a company that tells you exactly who’s walking through your door, proves it with a photo ID badge, and hands you a written price before anything gets touched. That’s the Brandt difference, and it’s why homeowners across San Antonio call us first.
Styles & brands we work with
Heating Repair in San Antonio
Heating repair in San Antonio means something different than it does in Dallas or Houston. Here, furnaces sit idle for eight months while AC runs nonstop, then get asked to fire up the morning after a Blue Norther drops temperatures 40 degrees overnight. A system that sat dormant through a humid summer can develop rust, seized blower bearings, and corroded electrical connections you won’t notice until the first cold night. Most heating repairs in San Antonio run $150 – $700, with ignitor replacements on the lower end and control board or blower motor replacements on the higher end.
Ignitor and Flame Sensor Work
San Antonio’s humidity accelerates corrosion on flame sensors, especially in slab-on-grade homes where furnace closets pull in garage air. A furnace that lights and then shuts off after a few seconds usually has a dirty or failed flame sensor. We clean or replace it, verify the flame signal, and test the full ignition sequence before we leave.
Control Board and Electrical Diagnostics
Thunderstorms roll through San Antonio year-round, and power surges are a constant threat to furnace control boards. We check for burned relay contacts, failed capacitors, and loose connections at the board level. If your furnace won’t respond to the thermostat, don’t assume the thermostat is bad. More often, the issue is a surge-damaged board in the furnace itself.
Boiler Repair in San Antonio
Boiler repair in San Antonio is less common than furnace work but absolutely necessary for the older homes that still rely on hydronic heat, particularly in neighborhoods like Monte Vista, Olmos Park, and the in-town bungalow districts. These systems use water instead of air to move heat, and they fail differently. A leaking circulator pump, a stuck zone valve, or an expansion tank that’s waterlogged can leave you with cold radiators and no obvious clue. Boiler repairs in San Antonio typically fall between $150 – $700 depending on the part.
Circulator Pumps and Zone Valves
When one room stays cold and the rest of the house heats fine, the problem is usually a zone valve or a circulator pump that’s no longer moving water. San Antonio’s hard water contributes to mineral buildup inside pumps and valves, shortening their lifespan. We flush and bleed the system when needed, which most homeowners never think to do until a radiator stops heating.
Expansion Tank and Pressure Issues
Boiler systems run under pressure, and a failed expansion tank can cause the pressure relief valve to drip or, worse, dump hot water. In older San Antonio homes with original copper piping, pressure swings put real stress on joints. We check tank precharge, system pressure, and relief valve operation on every boiler repair call.
Trusted Brands We Service in San Antonio
Brandt HVAC Co San Antonio repairs all major residential furnace brands, and we keep common parts stocked locally so you’re not waiting on a warehouse shipment. We work on Carrier, Daikin, and American Standard systems regularly across San Antonio. Because our techs see these units across every zip code from 78209 to 78258, we know which models have known failure points and which parts tend to fail after San Antonio’s hot, humid summers. That means fewer diagnostic hours and a faster fix for you.
See the difference
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AfterCommon Furnace Repair Problems We See in San Antonio Homes
- Power surge damage after thunderstorms: San Antonio’s severe storms knock out control boards and blower motors in slab-on-grade homes that lack surge protection on the HVAC circuit. A $150 capacitor replacement beats a $700 board replacement, but only if you act before the surge happens or soon after.
- Flooded condensers in low-lying areas: Homes near creeks and drainage channels, especially around Salado Creek and Leon Creek, see condenser flooding during torrential rain. Switching a flooded unit back on can short the compressor and turn a $200 cleaning into a $7,500 replacement.
- Rusted heat exchangers in attic-installed furnaces: Older in-town bungalows with furnaces in poorly ventilated attics develop rusted heat exchangers from San Antonio’s high humidity. A cracked heat exchanger isn’t just a repair issue; it’s a carbon monoxide risk that needs immediate attention.
- Hail-pitted condenser fins and oak pollen clogs: On the northwest side, frequent hail pits condenser fins and live oaks drop pollen that clogs coils every spring. A furnace or heat pump that’s working harder than it should will fail sooner, and regular coil cleaning extends its life.
Pricing for Furnace Repair in San Antonio, TX
Furnace repair in San Antonio runs $150 – $700 for most jobs. Here’s how that breaks down:
| Service | Typical San Antonio Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
An ignitor replacement usually lands around $150 – $300 parts and labor. A blower motor or control board runs higher, toward $500 – $700. What you’ll never get from Brandt is a tech who starts wrenching before you’ve seen a written price. Estimates are free. Call (361) 470-8872 and we’ll give you an exact number before anything gets touched.
We Also Serve Cities Near San Antonio
Our San Antonio crews regularly run calls to Schertz, Cibolo, Bulverde, and Floresville. If you’re just outside the city and your furnace quits during a cold snap, call (361) 470-8872 and we’ll get a technician dispatched from our San Antonio office. Same written-price guarantee, same Threshold Verified background-checked techs.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in San Antonio
No. If your outdoor unit sat in flood water, do not switch it back on. Water inside the compressor or electrical connections can short the entire system and turn a repairable problem into a full replacement. Cut power at the breaker and call (361) 470-8872. A technician will inspect, dry, and test the unit before restarting it safely.
Hail doesn’t just dent your roof. It pits condenser fins and can crack the coil, which reduces your system’s ability to transfer heat. On the northwest side, we also see oak pollen packed into coils every spring, choking airflow. If your furnace blows cold, it’s often a restricted coil or a heat pump reversing valve issue, not the burner itself. Call us for a diagnosis before the damage compounds.
Yes, and we recommend it for every San Antonio homeowner with an HVAC system. San Antonio’s thunderstorm season produces frequent power surges that fry furnace control boards and blower motors, especially in slab-on-grade homes where the HVAC circuit has no local surge protection. A quality surge protector costs far less than a single board replacement, and it also protects your refrigerator, washer, and electronics.
Schedule a tune-up once a year, ideally in October before the first real cold front. In San Antonio’s humidity, flame sensors corrode, drain lines clog with algae, and heat exchangers rust faster than in drier climates. A tune-up runs $80 – $200 and includes cleaning the flame sensor, checking the heat exchanger for cracks, and testing the full startup sequence.
SEER2 is the updated efficiency rating standard for HVAC systems that went into effect in 2023, and it accounts for real-world duct losses in hot, humid climates like San Antonio’s. If you’re repairing an older 10-SEER system after hail damage or surge failure, you may be better off replacing it with a higher-efficiency unit that meets SEER2 standards. Our techs can run the numbers and explain whether repair or replacement makes financial sense. Call (361) 470-8872 for a straight answer.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Antonio, serving San Antonio since 2003.