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
Furnace repair in San Antonio typically runs $150 – $700 depending on the failed part, and most no-heat calls we handle are diagnosed same day. That’s the honest range, in writing, before any tool comes off the truck. If your furnace sat silent through a long San Antonio summer and won’t fire on the first cold morning, the failure is usually a fouled ignitor, a dead blower capacitor, or thermostat drift, not a dead system. Dalton Heating & Air fields a live person 24/7 at (361) 306-9515, and we dispatch technicians to San Antonio neighborhoods including Alamo Heights, Stone Oak, Helotes, and the near Northwest Side inside a stated arrival window, not a vague “sometime today.”
Marco Benitez leads our San Antonio team under The Garrison Standard, a way of running calls that’s been in place since 2003: written pricing before work begins, a written guarantee on every repair, and a full-year commitment called the 365-Day Done Right Promise. No no-shows. No price that shifts at the door. Just a crew that arrives uniformed, background-checked, and ready to explain what failed in plain language.
Why Dalton Heating & Air Is San Antonio’s Preferred Furnace Repair Company
San Antonio homeowners call Furnace Repair the most in January, when the first sustained cold snap hits and furnaces that have been idle since February fail to light. Our local reputation is built on what happens after that call: a technician arrives inside the window, diagnoses the fault, and hands over a written price before touching a single component. That’s The Garrison Standard, and it’s not an option or an upsell. It’s how every job runs.
Our crews know the housing stock here. We work on furnaces in 1960s ranch homes off Vance Jackson, two-story builds in Cibolo Canyons, and newer construction near Government Canyon where undersized return ducts are common. That’s why our San Antonio technicians check static pressure and filter sizing as part of a repair, not as an afterthought. The repair is guaranteed in writing for a full year. If it fails in that time, we return at no charge.
We’re factory-trained on Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. That matters when your furnace has a proprietary control board or a variable-speed blower motor, because we diagnose by the manufacturer’s spec, not by guesswork. Every tech is background-checked, uniformed, and dispatched from our San Antonio metro office. You know who’s coming before they arrive.
Heating Repair in San Antonio
Heating repair in San Antonio is often less about worn-out parts and more about what happens when a system sits unused for eight-plus months. The city’s long idle season means ignitors foul with dust, blower capacitors degrade from attic heat and spring cedar pollen pulled across an undersized return, and thermostats drift after a decade of attic exposure. Most heating repairs in San Antonio fall between $150 and $700, with ignitor cleaning and replacement on the low end and blower motor replacement at the upper end.
Ignitor and Flame Sensor Service
When a furnace won’t start the burn, the ignitor or flame sensor is usually dirty or worn. On a unit that hasn’t fired since February, a thin film of dust and pollen is enough to prevent ignition entirely. Our techs clean the flame sensor, test ignitor resistance against the manufacturer’s spec, and replace the part only if it’s actually failing. A typical call runs $150 – $300, and we test-fire the burn cycle before we leave.
Blower Motor and Capacitor Replacement
A furnace that fires but won’t push warm air through the house points to the blower side. San Antonio’s caliche dust is a known killer of blower capacitors, especially on units where the filter hasn’t been upgraded from the builder-grade original. We stock capacitors and blower motors locally for faster turnaround, and the written price covers the part, labor, and a full-year guarantee.
Boiler Repair in San Antonio
Boiler repair in San Antonio is less common than furnace work, but the city has a pocket of homes with hydronic heating, particularly older builds near Monte Vista and Olmos Park where radiators and baseboard convectors were standard. When a boiler fails, the symptoms are different from a furnace: pressure drops, circulator pumps that don’t spin, air trapped in the loop. Boiler repairs in San Antonio run $150 – $700, with circulator pump replacement and zone valve work at the higher end.
Circulator Pump and Zone Valve Work
If one room stays cold while others heat fine, the zone valve for that loop has likely failed. Our techs ring out the valve with a multimeter, verify the circulator pump is moving water, and bleed trapped air from the system. We repair what’s failed and test the whole loop before we write the guarantee.
Pressure and Expansion Tank Checks
Boilers don’t like air. A waterlogged expansion tank or a bad fill valve causes rapid pressure swings that stress every component in the system. Part of every boiler repair call in San Antonio includes checking system pressure against the tank’s spec and correcting it. The repair is guaranteed in writing, and if the same fault recurs within the year, the second visit is free.
Trusted Brands We Service in San Antonio
Dalton Heating & Air is factory-trained on the major residential brands, and we stock local parts in San Antonio for Trane, Lennox, and Goodman furnaces, plus control boards and ignitors for Rheem. That local parts inventory means we’re not waiting on a shipped component when your house is cold. Because we service all nine major brands, we don’t steer you toward a replacement because we lack the training to fix what you already own. We diagnose against the manufacturer’s spec, replace only what’s failed, and put it in writing.
Common Furnace Repair Problems We See in San Antonio Homes
- Ignitor and flame sensor fouling after the idle summer. The first real cold snap of the year triggers a wave of no-heat calls on furnaces that haven’t run since February. A $150 – $300 cleaning and test-fire gets most of them back online.
- Blower motor capacitors killed by caliche dust and cedar pollen. San Antonio’s dry spring and summer put fine grit through under-filtered returns, and capacitors fail as a result. We stock replacements locally and test after the swap.
- Thermostat calibration drift from attic heat. A decade of San Antonio summers shifts thermostat sensing by several degrees, which makes the furnace short-cycle. It looks like a furnace failure but it’s often a $150 calibration-and-recheck fix.
- Undersized return ducts on newer San Antonio construction. Homes built fast during growth years near Government Canyon and Alamo Ranch often have return ducts too small for the blower’s airflow. That raises static pressure, strains the motor, and shortens its life. We check static pressure on repair calls and tell you honestly what it means.
Pricing for Furnace Repair in San Antonio, TX
Here are the price ranges for the work we do in San Antonio, in writing, before any work starts:
| Service | Price Range |
|---|---|
| Heating Repair | $150 – $700 |
| Boiler Repair | $150 – $700 |
| AC Repair | $150 – $650 |
| AC Installation | $3500 – $7500 |
| Tune-Up | $80 – $200 |
The spread reflects part cost and labor time. A dirty flame sensor might be a $150 cleaning. A failed blower motor on a variable-speed Trane is a different job and lands near $700. Either way, the price is in writing before we start, and we don’t charge overtime for nights or weekends. Estimates are free. Call (361) 306-9515 and we’ll give you a firm range for your exact furnace.
We Also Serve Cities Near San Antonio
Dalton Heating & Air responds to furnace repair calls throughout the San Antonio metro, including Converse, Universal City, Schertz, and Helotes. Same response standard, same written pricing, same full-year guarantee. If you’re in one of those communities and your furnace won’t light, call the same number: (361) 306-9515.
One call worth describing: a homeowner on Mockingbird Lane near Alamo Heights called after a 38-degree night with no heat. Our tech found a bulged run capacitor on her 2015 Carrier blower motor, swapped the capacitor and the motor, then checked static pressure because her return duct was undersized for the 3-ton tonnage. She was ready to buy a whole new system. The repair came in at $610, and the furnace tested clean on the heat exchanger.
That’s the honest repair-versus-replace question, and San Antonio’s climate makes it more common than you’d think. Mild winters mean furnaces idle eight-plus months a year, so the failures we see are rarely worn-out heat exchangers. They’re capacitors, blower motors, and thermostat drift. A proper repair with a written guarantee is often the right call.
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
In most San Antonio homes, yes, repairing is worth it. Because our winters are short, furnaces accumulate far fewer run-hours than systems in colder cities, so the core components usually have years of life left. The no-light-after-summer failure is typically a fouled ignitor or dead capacitor, a $150 – $300 repair. If your heat exchanger tests clean and the repair is under 30% of replacement cost, we’ll tell you to repair. We don’t sell replacements because a repair is “too small” to bother with. Call (361) 306-9515 and we’ll give you an honest read.
Yes, it matters for repair decisions too, but in a specific way. A load calculation tells you the heating demand of your specific house as-built, not the tonnage the builder guessed at. San Antonio homes often have oversized furnaces because builders spec for worst-case nights that rarely happen. If your blower motor fails repeatedly or your system short-cycles, a load calculation shows whether the equipment is fighting its own sizing. On a repair call, we check what matters: static pressure, airflow, and the relationship between your furnace’s output and your home’s actual load. That’s the piece most repair companies skip.
For San Antonio’s mild winters, AFUE matters less than it does in Minnesota, and a higher SEER number on your AC matters more for annual energy cost. AFUE is the furnace’s fuel efficiency: an 80% AFUE furnace sends 20 cents of every gas dollar up the flue; a 95% AFUE unit sends only 5 cents. But the difference shows up most in long, cold winters. A homeowner in San Antonio who runs heat 30 days a year won’t recover the cost of a 95% furnace as fast as a Chicago homeowner. If your existing furnace is reliable and the heat exchanger is clean, an efficiency upgrade is rarely an emergency. We’ll show you the math on your actual bill, not a national average. Call (361) 306-9515 for a straight answer.
We answer the phone with a live person 24/7, and we schedule no-heat calls in San Antonio with an arrival window that day, not a callback tomorrow. January is our busiest month because the first sustained cold snap catches every furnace that sat idle since spring. On those days we prioritize no-heat calls and dispatch in order of severity. You schedule a cold call, we show up inside the window, and the repair price is in writing before we start. If you’re in Alamo Heights, Stone Oak, Helotes, or anywhere in our San Antonio service area, call (361) 306-9515.
We repair all nine major residential brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. Our techs are factory-trained on each, and we stock local parts in San Antonio for common Trane, Lennox, Goodman, and Rheem failure points including ignitors, flame sensors, capacitor, and control boards. If your furnace is an older brand or a less common model, call (361) 306-9515 and we’ll tell you honestly whether we can source the part same-day or if it needs to be ordered.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving San Antonio under The Garrison Standard since 2003.