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
Most furnace repairs in San Antonio run $150 – $700 and can be completed same-day when parts are available. Our Furnace Repair team dispatches from our San Antonio office to reach homes from Stone Oak to Converse, Helotes to Universal City, typically within hours of your call. When your furnace quits on a January night and temperatures are dropping through the 30s, you need a technician who shows up with the right parts and a written price before touching anything. Call (984) 538-9003 – a live person answers, 24 hours a day.
San Antonio’s furnace problems aren’t generic. The far north side’s 2000s – 2010s builder-grade equipment, the hard Edwards Aquifer water scaling coils and drains, and the lingering damage from Winter Storm Uri have created failure patterns that technicians from outside this market simply don’t recognize. We do. We’ve worked on the exact furnaces installed in your neighborhood, and we know which builders registered warranties and which left homeowners exposed.
Why Brandt HVAC Is San Antonio’s Preferred Furnace Repair Company
We’ve been part of the Threshold Group family since 2003, and our San Antonio location operates independently with its own stocked warehouse and dispatch team. That matters when you need a blower motor for a Goodman furnace in Schertz or a heat exchanger for a Carrier in Leon Valley – we don’t wait on a parts truck from another city.
Our technicians are Threshold Verified: background-checked, identity-verified, sent to you by name and photo before arrival, with a photo ID badge shown at your door. If anyone arrives who you weren’t told to expect, that visit is on us. For homeowners in San Antonio who are home alone, raising children, or older and cautious about who enters, this isn’t a nice extra. It’s the reason people choose us.
Every repair begins with a written price. No work starts until you see and agree to the cost in writing. Every repair also carries a written guarantee under our 365-Day Done Right Promise: if the repair fails within that year, we return at no charge. No argument. No additional fee.
Phones are answered by a live person 24/7. Nights, weekends, holidays. No voicemail, no callback queue, no automated phone tree.
Furnace Tune Up in San Antonio
Furnace Tune Up in San Antonio is preventive maintenance designed for a climate where your heating system sits idle through eight months of brutal heat, then gets asked to perform on the first cold night of December. We inspect, clean, and test every component before you need heat, because finding a cracked heat exchanger or a failing ignitor during a tune-up beats discovering it at 2 a.m. when it’s 28 degrees outside. In San Antonio, a Furnace Tune Up runs $80 – $200 and includes a written report of everything we find.
What the Tune-Up Covers
We pull and inspect the burners, test the ignitor and flame sensor, measure gas pressure at the valve, check the heat exchanger with a camera scope, and test blower amp draw against manufacturer spec. We also flush the condensate drain – critical here, because San Antonio’s 400+ mg/L hard water scales drain lines solid. A backed-up drain rusts the heat exchanger from the inside out. We document static pressure across the coil and filter, and we note any duct leakage we can access. You get the written report, not a sales pitch.
When to Schedule
October and early November are ideal. Furnaces that have sat in 150°F attics all summer develop cracked ignitors, corroded flame sensors, and blower motors with dry bearings. Scheduling before the first cold snap means parts are in stock and technicians aren’t slammed with no-heat emergencies. If you’ve never had a tune-up on a builder-installed furnace in Stone Oak, Alamo Ranch, or near Converse, you’re likely running equipment that was never properly commissioned.
Emergency Furnace Repair in San Antonio
Emergency Furnace Repair in San Antonio means a live person answers your call, a technician is dispatched with your name and photo confirmation, and we arrive with diagnostic tools and common parts to restore heat the same night when possible. Emergency Furnace Repair costs the same $150 – $700 range as standard repairs – we do not charge overtime premiums for after-hours, weekend, or holiday calls. The price is the price, written before work begins.
No-Heat Nights and Safety
A failed furnace in San Antonio isn’t just uncomfortable. When temperatures drop 60 degrees in 24 hours during an Arctic outbreak, a home without heat becomes dangerous for infants, elderly residents, and anyone with respiratory conditions. We treat no-heat calls as genuine emergencies. Our San Antonio office stocks heat exchangers, ignitors, gas valves, and blower motors for Carrier, Trane, Lennox, Goodman, and Rheem systems – the brands we see most in local homes.
What Counts as an Emergency
Call us for any of these: no heat at all, a burning smell from vents, a carbon monoxide detector alarm, or a furnace that cycles on and off repeatedly without reaching temperature. Short-cycling often signals a cracked heat exchanger or dangerous rollout – both require immediate professional attention. Do not attempt to bypass safety switches or continue running a furnace that trips its high-limit.
Trusted Brands We Service in San Antonio
We repair and maintain Carrier, Trane, Lennox, Goodman, and Rheem systems – the five brands that dominate San Antonio’s residential market, especially in the 2000s – 2010s far-north-side subdivisions where builders installed equipment by the tract. Our San Antonio warehouse stocks the most common failure parts for these brands: ignitors, flame sensors, blower motors, control boards, and heat exchanger assemblies. That local inventory means faster repairs without waiting on Dallas or Houston distribution. We also service York, Daikin, Bryant, and American Standard, though these appear less frequently in the local housing stock.
Common Furnace Repair Problems We See in San Antonio Homes
- Cracked heat exchangers in rule-of-thumb-sized furnaces. Builder-grade furnaces in far-north-side homes were often sized by square-footage estimates rather than Manual J load calculations. The heat exchanger overheats every cycle, fatiguing the metal until it cracks. Carbon monoxide risk follows. We inspect with camera scopes and combustion analyzers.
- Blower motors burned out from high static pressure. Attic-mounted air handlers with undersized flex returns – a single 16-inch run serving a 2,500-square-foot home is common in Stone Oak and Alamo Ranch – force the blower to pull excessive amps. The motor overheats and fails prematurely. We measure static pressure and correct duct sizing where accessible.
- Condensate drain scaling from Edwards Aquifer hard water. San Antonio’s ~400 mg/L water hardness deposits calcium carbonate in drain pans and lines until water backs into the cabinet. The heat exchanger rusts from the outside in. We descale drains and install overflow protection.
- Uri-era freeze damage to heat pump auxiliary heat. Winter Storm Uri destroyed heat pump reversing valves and undersized auxiliary heat strips that were never engineered for prolonged sub-teens operation. Many San Antonio homeowners still don’t realize their “furnace” is actually a heat pump with electric backup that failed in 2021 and was never properly restored.
Pricing for Furnace Repair in San Antonio, TX
| Service | Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune Up | $80 – $200 |
| Emergency Furnace Repair (after-hours diagnostic and repair) | $150 – $700 |
What drives the cost? Parts, primarily. An ignitor replacement in a San Antonio home might land near the lower end. A heat exchanger replacement in a high-static-pressure system – common in the far north side’s builder-grade installs – pushes toward the upper range because we also correct the duct deficiency that caused the failure. We give you a written, itemized price before any work starts. Every time, no exceptions. Estimates are free. Call (984) 538-9003.
Here’s what you won’t pay for: a second trip if our repair fails within 365 days. That’s our Done Right Promise. You also won’t pay overtime premiums for nights, weekends, or holidays. The rate is the rate.
We Also Serve Cities Near San Antonio
Our San Antonio office dispatches technicians daily to Furnace Repair in San Antonio and surrounding communities: Converse, Universal City, Schertz, and Helotes. Each shares the same builder-grade housing stock, hard water, and post-Uri repair needs that define this market. Same live-answer phones, same Threshold Verified technicians, same written pricing.
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
Because it was likely sized by rule-of-thumb tonnage rather than a room-by-room Manual J load calculation, and it’s been running against a duct system with static pressure far above manufacturer spec. The heat exchanger overheats and fatigues with every cycle. In Converse and similar northeast San Antonio subdivisions, we see this pattern repeatedly in 2010s Goodman and Carrier installs. Call (984) 538-9003 for a free inspection – we check heat exchangers with camera scopes on every service call.
Short-cycling in Stone Oak two-stories almost always traces to a combination of rule-of-thumb equipment sizing and a single undersized return duct fighting against open floor plans that demand precise airflow balance. The furnace overheats, hits its high-limit, shuts down, cools, and restarts – sometimes dozens of times per hour. We measure temperature rise and static pressure, then correct what we can within the existing duct system. In some cases, zoning or return-air modifications are needed. Call (984) 538-9003 for diagnostic pricing.
Often, no. Builder-installed equipment in San Antonio frequently ships with a 10-year parts warranty, but only if registered within 60 or 90 days of installation. Many builders never completed this step, or registered it to themselves rather than the homeowner. We check serial numbers against manufacturer databases on every call. If your warranty is valid, we use it. If it’s lapsed due to registration failure, we give you the exact out-of-pocket cost in writing before starting work. Call (984) 538-9003 and we’ll verify your coverage.
No, though many San Antonio homeowners use the terms interchangeably. A heat pump uses refrigerant to move heat; auxiliary electric strips provide backup. When a heat pump freezes or its reversing valve fails, you’re often running on those strips alone – insufficient for our periodic deep freezes, and expensive. Winter Storm Uri destroyed thousands of these systems. We diagnose whether you have a true gas furnace, a heat pump with auxiliary heat, or a hybrid system, then repair the correct component. Call (984) 538-9003 for same-day diagnosis.
San Antonio’s Edwards Aquifer water at ~400+ mg/L hardness deposits calcium carbonate in condensate drain pans and lines until they scale solid. Water backs into the furnace cabinet, rusting the heat exchanger and corroding electrical components. We also find evaporator coils mineralized from years of hard-water misting, restricting airflow and forcing the furnace to overheat. During every repair, we inspect and clear drains; we also recommend overflow switches and annual descaling. This failure pattern is essentially unknown to technicians in Austin, where different water sources produce different problems. Call (984) 538-9003 for a free estimate.
Ready to get your heat back? Call Brandt HVAC at (984) 538-9003. A live person will answer, day or night, and we’ll send a Threshold Verified technician with a written price before any work begins. Every repair is guaranteed for 365 days. If it’s not done right, we make it right.
Written by Devin Marlowe, Owner at Brandt HVAC, serving San Antonio and surrounding communities.