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 can be diagnosed and fixed the same day. We’re Dalton Heating & Air, part of the Garrison Partners network held to The Garrison Standard since 2003, and we serve San Antonio homes with written pricing before any work starts. Every repair includes a written guarantee for a full year, and if the fix doesn’t hold within that window, we return at no charge. Call (361) 306-9515 and a live person answers, 24/7.
What sets San Antonio’s heating issues apart isn’t extreme cold. It’s the months of inactivity followed by a sudden demand. Furnaces here sit idle through the long cooling season, and when the first cold front rolls in, components that would’ve failed gradually in a colder climate fail all at once. We know this pattern from years of working homes throughout the area, and we stock parts accordingly.
Why Dalton Heating & Air Is San Antonio’s Preferred Furnace Repair Company
We show up inside the stated window, put the price in writing before work begins, and leave the site clean. That’s the Garrison Code, and it applies on every job in San Antonio, no exceptions. Our technicians are background-checked, uniformed, and factory-trained to service nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard.
Marco Benitez runs our team, and the standard he holds is simple: do the job by the book and stand behind it for a full year. When a San Antonio homeowner calls with a furnace that won’t ignite, they’re not getting a callback window. They’re getting a person on the phone and a scheduled arrival time. Our crews know the neighborhoods, the housing stock, and the specific furnace failures common to this part of Pasco County.
Our Furnace Repair team carries the parts most likely to fail in San Antonio’s climate: gas valves, ignitors, blower motor capacitors, and heat exchanger gaskets. That means fewer return trips and faster fixes. Dispatch and scheduling are coordinated from our South FL office in Miami, but the crews serve San Antonio locally.
Boiler Repair in San Antonio
Boiler repair in San Antonio is a specialized call that most HVAC companies won’t take, and homeowners with hydronic heat often struggle to find a tech who actually understands the system. We do. Our boiler work covers circulator pumps, expansion tanks, zone valves, aquastats, and pressure controls, and the job starts with a written price before we touch a single fitting. Most boiler repairs in San Antonio run $150 – $700 depending on the component.
Boilers aren’t the most common heating system in San Antonio, but they exist in older homes and some custom builds near the River Walk corridor. When one fails, it’s usually the circulator pump or a stuck zone valve, not the boiler itself. We diagnose the system end-to-end before replacing anything.
Boiler Pressure and Expansion Issues
Low boiler pressure is the most frequent complaint we hear from San Antonio boiler owners. It’s often the expansion tank losing its air charge, which is a simple test and an honest fix. We price it the same way we price everything: in writing, before the work starts.
Boiler Making Noise or Short Cycling
A boiler that short-cycles or bangs is usually air in the lines or a faulty aquastat. We bleed the system, verify the setpoint, and replace the control only if it actually fails. No parts get sold on a guess.
Gas Furnace Repair in San Antonio
Gas furnace repair in San Antonio carries a specific pattern we see every winter: a furnace that worked fine in January sits untouched from March through November, and then a cold snap hits. The gas valve, which has been stuck in one position for eight months, won’t open. Or the ignitor cracks from thermal shock. These are not complex jobs, but they need a tech who knows what to check first. Most gas furnace repairs here run $150 – $700.
San Antonio sits on the edge between humid Gulf air and drier Hill Country air, and that boundary does real damage to furnace cabinets. We find more condensate corrosion and rust in furnace cabinets here than in cities with consistent humidity. It’s a local failure mode that a generic checklist misses.
Ignitor and Gas Valve Diagnostics
A furnace that clicks but won’t light is usually the ignitor or the gas valve. We test both before replacing either, and we show you the reading. The price is in writing before we swap a part, and the repair carries a one-year written guarantee.
Heat Exchanger Inspection and Repair
A cracked heat exchanger is a safety issue, not a performance issue. It can leak carbon monoxide into the home, and it’s the one furnace problem we refuse to patch. We inspect with a combustion analyzer, show you the results, and give honest repair-versus-replace guidance based on the furnace’s age and condition. If the exchanger is cracked, we shut the system down until it’s safe.
Trusted Brands We Service in San Antonio
We service Trane, Lennox, Goodman, and Rheem furnaces in San Antonio, among others, and we carry common replacement parts for these brands locally. That means a failed ignitor on a Trane doesn’t become a two-day wait. Our techs are factory-trained on all nine major residential brands, so when a Goodman gas valve fails or a Lennox blower motor seizes, we diagnose it correctly the first time and price it in writing before any work begins.
Common Furnace Repair Problems We See in San Antonio Homes
- Gas valve stuck from summer inactivity. After San Antonio’s long cooling season, a furnace that hasn’t run since last winter often has a gas valve that won’t open. It’s the most common no-heat call we take in November and December.
- Heat exchanger cracks from rapid temperature swings. A sudden cold front following a warm spell stresses the heat exchanger metal, which hasn’t expanded evenly. Homes near the River Walk and older neighborhoods see this more often than newer construction.
- Blower motor capacitor failure. The same weak capacitor that plagues summer AC calls also stops the furnace fan. It’s frequently misdiagnosed as a thermostat problem, but the fix is a $20 part, not a $500 control board.
- Corrosion from the Gulf air boundary. San Antonio’s position between humid Gulf air and drier Hill Country air creates more condensate in furnace cabinets. Rusted burner assemblies and corroded wiring connectors are routine finds here.
Pricing for Furnace Repair in San Antonio, FL
Most furnace repairs in San Antonio run $150 – $700, and we give the exact price in writing before any work begins, on every job, without exception. A furnace tune-up runs $80 – $200 and includes a written report of what we found. AC repair, if the issue turns out to be the paired cooling system, runs $150 – $650. Here’s the honest breakdown:
| Service | Typical Cost in San Antonio |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
| AC Repair | $150 – $650 |
What moves the price is the part. An ignitor swap is on the low end. A heat exchanger replacement is on the high end and sometimes crosses into replace-the-whole-furnace territory, which is exactly the conversation we’ll have with you in plain terms. Estimates are free. Call (361) 306-9515.
We Also Serve Cities Near San Antonio
We regularly run furnace repair calls to Wesley Chapel, Dade City, Zephyrhills, and Brooksville. If you’re in any of those areas, you get the same written pricing, the same one-year guarantee, and the same live person on the phone. See our full Furnace Repair in San Antonio page for coverage details.
Serving San Antonio, FL - 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
Nine times out of ten in San Antonio, a furnace that won’t ignite after sitting all summer is a stuck gas valve or a failed ignitor, not the thermostat. The long cooling season leaves the gas valve in one position, and a sudden cold front asks it to open for the first time in months. Call (361) 306-9515 for a diagnosis with the price in writing before we replace anything.
Start with the age of the furnace and the cost of the repair. If the furnace is under 12 years old and the repair is under $500, repair usually wins. If it’s over 15 years old and the repair is over $600, or the heat exchanger is cracked, replacement often makes more sense. In San Antonio, our mild winters mean a well-maintained furnace lasts longer than it would up north, so repair is often the right call here when it wouldn’t be in a colder climate. We’ll run the numbers with you, honestly, and the estimate is free.
Most furnace repairs in San Antonio run $150 – $700 depending on the failed component. An ignitor replacement sits at the low end, while a gas valve or blower motor replacement lands mid-range, and a heat exchanger replacement is the high end. Every price is in writing before work starts. For an exact quote on your specific furnace, call (361) 306-9515.
That’s usually dust burning off the heat exchanger after months of summer inactivity, and it clears within a few hours. If the smell persists past a day, or if it smells like gas or something acrid rather than dusty, shut the furnace down and call us. In San Antonio’s humid-then-dry climate swings, we also check for mold on the coil and debris in the blower housing, which can produce a musty rather than burning odor. Call (361) 306-9515 if you’re unsure.
Yes. We repair gas furnaces in every San Antonio neighborhood, and we also take boiler calls that most HVAC companies won’t. If you have a hydronic system with radiators or baseboard heat, our techs diagnose the circulator pump, zone valves, expansion tank, and controls the same way we diagnose a furnace: with a written price and a one-year guarantee on the repair. Call (361) 306-9515 for either system.
We were called to a home near the San Antonio River Walk after the first cold night of the year. The gas furnace would click but not ignite. Our tech found a cracked heat exchanger, verified the refrigerant charge on the paired AC system was low from a slow leak, and replaced the heat exchanger plus a weak capacitor on the blower motor. We then ran a load calculation on the whole system to confirm the tonnage and static pressure were right for the home before recommending any replacement. That’s the difference between a parts-swapper and a real diagnostic crew.
If your San Antonio furnace won’t start, won’t stay lit, or is making noise it didn’t make last winter, call Dalton Heating & Air at (361) 306-9515. A live person answers, the price is in writing before any work begins, and the repair is guaranteed for a full year. If the fix fails within that year, we return at no charge.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving San Antonio since 2003.