Seasonal 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.
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AfterFast, Reliable Furnace Repair Across San Antonio
When your furnace quits on a 28-degree January night in San Antonio, you don’t need a callback. You need a technician who answers the phone at 2 a.m. and knows exactly what a blue norther does to gas valves, heat exchangers, and condensate lines across this city. At Meadowsweet Heating & Air, our Furnace Repair team handles everything from ignitor failures in 1970s South Side tract homes to propane regulator problems on rural Hill Country properties. We stock parts for Trane, Lennox, and Rheem locally, so most San Antonio jobs are finished same-day. Call (747) 966-3037 and a live person picks up. No voicemail queue. No answering service relay.
Why Meadowsweet Heating & Air Is San Antonio’s Preferred Furnace Repair Company
San Antonio isn’t Dallas or Houston. Our technicians understand that a furnace in Alamo Ranch was likely installed to satisfy a VA-loan appraisal, while one in Helotes is more likely running on propane against a wind-exposed north wall. That’s difference between a fix that holds and one that fails again in February. Luis Serrano, who leads our crew, trains every technician on San Antonio’s specific failure patterns: hard-water scaling from the Edwards Aquifer, freeze damage from Arctic fronts, undersized systems in older northeast-corridor homes. We don’t guess at your system. We check the whole picture, including the condensate drain, gas pressure, and intake clearances.
And we leave the house the way we found it. Shoe covers at the door. Drop cloths under the work zone. A photo of the clean-up before the crew leaves, on every job, automatically. Our C.A.R.E. values aren’t a poster in the office. They’re how our uniformed, background-checked technicians behave around your kids, your pets, and your floors. Every visit includes a written price before any work starts, and the 365-Day Done Right Promise stands behind every repair. If it isn’t done right, we make it right. No runarounds.
Gas Furnace Repair in San Antonio
Gas Furnace Repair in San Antonio runs $150-$700, depending on whether we’re replacing a $20 ignitor or a $400 gas valve on a 1990s Goodman in Converse. The city’s patchwork of natural gas lines, older propane installations, and post-Uri freeze damage means two homes on the same street can fail for entirely different reasons. We test gas pressure at the manifold, inspect the heat exchanger for cracks and rust-through, verify the draft inducer is moving combustion air correctly, and check for the mineral buildup that hard Edwards Aquifer water leaves on condensate components.
When a San Antonio Furnace Can’t Keep Up
A furnace that runs constantly but never satisfies the thermostat is usually fighting one of two local problems: a heat exchanger losing efficiency to internal scaling, or ductwork in an unconditioned attic bleeding heat into 150-degree summer air and cold winter air alike. We measure static pressure and temperature rise during the visit, not after the third callback.
Rural Propane and Freeze Protection
Outside the natural gas service area, in places like Helotes and Leon Springs, most furnaces run on propane. A regulator that’s dropped below spec or a tank low on pressure will cause a furnace to short-cycle or burn dirty. We test the whole line when we hear “it worked last winter.”
Furnace Tune Up in San Antonio
A Furnace Tune Up in San Antonio costs $80-$200 and is the cheapest insurance against the city’s two biggest threats: the first hard freeze and the accumulated mineral scale from Edwards Aquifer water. We recommend an annual tune-up in October or November, before the blue northers arrive. The visit includes cleaning the flame sensor, testing the ignitor’s amp draw, checking gas pressure, flushing the condensate drain, inspecting the heat exchanger, and verifying the limit switch opens and closes at the correct temperatures.
What We Clean and Test
The flame sensor on a furnace that hasn’t been serviced in two years will often be coated in a film just thick enough to prevent the burners from staying lit. It’s a $5 part and a 15-minute fix. But if the condensate drain is blocked by scale, the furnace may shut down entirely, or worse, rust out the heat exchanger from backed-up water. We address both during the same visit.
Tune-Ups for Outbuildings and Workshops
Many San Antonio properties have a separate furnace or heat pump in a workshop, detached garage, or barn. These units fail faster because they’re often undersized, uninsulated, and exposed to wind on all sides. A tune-up catches the short-cycling and overheating before a cracked heat exchanger becomes a carbon monoxide risk in a space where someone works with solvents and fuels.
Trusted Brands We Service in San Antonio
Our technicians work on nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. What that means practically in San Antonio is we keep common parts on the truck for Trane, Lennox, and Rheem systems, which are among the most common in the older northwest corridors and newer master-planned communities alike. If your unit needs a less common part, we source it from local supply houses the same day. You won’t wait a week for a capacitor.
Common Furnace Repair Problems We See in San Antonio Homes
- Scaled condensate drains and rusted heat exchangers. The Edwards Aquifer gives San Antonio some of the hardest water in Texas. That mineral scale clogs condensate traps, trips limit switches, and sends backed-up water into the heat exchanger, which rusts it out and creates a carbon monoxide hazard.
- Freeze-damaged furnaces after blue northers. February 2021 taught the whole city what near-8°F does to unprotected equipment. Cracked heat exchangers and split condensate lines are still showing up in systems that were never inspected after Uri.
- Propane regulator and gas pressure failures on rural properties. Outside the natural gas grid, in Helotes, Leon Springs, and along the far northwest edge of San Antonio, a failing regulator or moisture in the line causes ignition problems, soot buildup, and incomplete combustion.
- Undersized furnaces in unconditioned attics. Most San Antonio homes route ducts and sometimes the furnace itself through attics that hit 150°F in August and near-freezing in January. An undersized unit runs constantly, short-cycles, and burns out blower motors years early.
Pricing for Furnace Repair in San Antonio, TX
| Service | Typical Range |
|---|---|
| Gas Furnace Repair | $150-$700 |
| Furnace Tune Up | $80-$200 |
Most furnace repairs in San Antonio fall between $150 and $700. What moves the number: a $20 ignitor versus a $400 gas valve, the age of your equipment, and whether the problem is isolated or has been wearing down other components. A tune-up sits between $80 and $200 and includes the full inspection and cleaning. Before any work starts, you get a written price. If the repair isn’t done right within 365 days, we make it right at no charge. Call (747) 966-3037 for a free estimate on your furnace repair in San Antonio.
We Also Serve Cities Near San Antonio
Beyond our work across San Antonio, our crews regularly serve Converse, Universal City, Schertz, and Helotes. We’re familiar with the propane systems out on the northwest side and the tract-home furnaces closer in, which means faster diagnosis and fewer return trips.
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
Yes. We service propane furnaces in Helotes, Leon Springs, and the rural northwest edge of the San Antonio metro. Most of these systems run on propane because natural gas lines don’t extend that far. We test tank pressure, regulator output, and manifold pressure during a repair, and we install freeze protection on exposed condensate drains. Call (747) 966-3037 to schedule a visit.
San Antonio draws its water from the limestone Edwards Aquifer, which is among the hardest municipal water sources in Texas. That mineral content scales up condensate drains and pans faster than in Houston or Dallas, blocking water flow, tripping limit switches, and rusting heat exchangers. For this reason, we include a drain-line flush with every tune-up.
Furnaces in unconditioned attics, which are common in San Antonio’s 1950s-to-1990s slab homes, are exposed to extreme temperature swings. In August, the attic can hit 150°F and in January it can drop below freezing. Components age faster there: capacitors drift, blower motors overheat, and condensation lines crack. We account for that exposure when diagnosing repairs and recommending preventative work.
After a hard freeze, a furnace that short-cycles is often reaching its limit switch too quickly. The usual culprits in San Antonio are a scaled or frozen condensate line, a cracked heat exchanger from freeze expansion, or a gas valve no longer holding pressure. We test all three during a repair visit rather than replacing one part and hoping the problem goes away.
Yes. We tune up furnaces in detached workshops, garages, and barns throughout the San Antonio area. These units are frequently undersized for the space and exposed to wind on all sides. A tune-up checks combustion, gas pressure, limit switch operation, and condensate drainage. It’s $80-$200 and prevents failures during the next cold snap. Call (747) 966-3037 to book one.
How San Antonio’s Geology and Water Change the Repair Job
Before a repair even starts, San Antonio’s geography and geology shape what’s broken. The city sits on the Balcones Escarpment, the geological fault line separating the Edwards Plateau from the South Texas plains. This means northwest neighborhoods like Helotes and Leon Springs can run four to six degrees colder than the South Side on the same January night. A furnace sized for the south side won’t keep up on the northwest edge, and a system in Leon Springs with no wind shelter is fighting a colder ambient temperature and a harder workload. Add to that the city’s water, drawn from the limestone Edwards Aquifer. It is among the hardest in the state. That hardness scales condensate drains, starves gas valves of proper drainage, and shortens the life of heat exchangers. When a rancher in Helotes reported his Carrier gas furnace short-cycling, we found a cracked heat exchanger caused by the 2021 freeze and a capacitor that had drifted out of spec. Because his rural property also relies on a propane tank, we tested the regulator and gas pressure, replaced the exchanger and capacitor, and added freeze-protection to the condensate drain, which was already scaling from the hard Edwards water. The repair restored reliable heat and prevented a repeat failure during the next cold front. That’s the difference between a technician who reads a parts list and one who understands San Antonio.
Written by Luis Serrano, Owner at Meadowsweet Heating & Air, serving San Antonio since 2004.