Trusted HVAC for San Antonio Homeowners
When your air conditioner quits during a San Antonio August afternoon, you don’t need a call center. You need a team that shows up, diagnoses the problem honestly, and puts the price in writing before touching a single component. That’s what Garrison Partners delivers through our San Antonio HVAC brand. Led by Preston Harley, our local team has built a strong reputation across Alamo Heights, Stone Oak, Alamo Ranch, and the neighborhoods around Lackland and Fort Sam Houston. We answer the phone live, 24/7, and we back every repair and installation with the Garrison Standard: a full-year written guarantee on workmanship. Call (409) 215-3468 and you’ll get a real person who can schedule your service.
What Our HVAC Service Includes
HVAC in San Antonio covers two systems that work as one: heating and cooling. Most homes here run a central air conditioner paired with either a gas furnace or an electric heat pump. When either side fails, the whole house feels it. Here’s what we handle, and how we approach each piece of the job.
AC Repair and Troubleshooting
San Antonio summers push air conditioners harder than almost any other climate in the country. A unit that runs constantly, short cycles, or blows warm air is burning electricity and heading toward a full failure. Our technicians run through the entire refrigerant circuit, test capacitors and contactors, check airflow across the evaporator coil, and measure the refrigerant charge against manufacturer specs. We don’t replace parts on a guess. We find the failing component, show you what’s wrong, quote the repair in writing, and only start once you approve the number. Most AC repairs in San Antonio run $150 to $600 depending on whether it’s a simple capacitor or a compressor failure. Call (409) 215-3468 and we’ll tell you what we’re seeing before we quote anything.
Furnace and Heat Pump Repair
Yes, San Antonio gets cold. Maybe not Minnesota cold, but January nights in the 30s make a working furnace non-negotiable, especially in older homes in Terrell Heights and Monte Vista where heat runs on gas. We diagnose heat pumps differently than furnaces: a heat pump that won’t switch into heating mode often points to a reversing valve or thermostat wiring issue, while a furnace that won’t fire usually comes down to an igniter, flame sensor, or gas valve. Either way, the diagnostic comes first and the price comes before the work. Our heating repairs start around $150 and rarely exceed $600 for single-component fixes.
Full System Installation and Replacement
When a compressor fails on a 15-year-old R-22 system, replacing the whole condenser and evaporator coil usually makes more financial sense than patching it. We replace complete AC systems, furnaces, and heat pumps sized to the square footage, insulation level, and window orientation of your specific San Antonio home. No rule-of-thumb sizing. We run a Manual J load calculation, which accounts for how your house actually gains and loses heat, not just its floor plan. Then we give you a written quote with the equipment model, efficiency rating, and full scope of work. A new system in San Antonio typically runs $5,000 to $12,000 installed depending on brand, efficiency, and whether ductwork changes are needed. We never start a replacement without a signed contract and a fixed number.
Thermostat and Controls
A surprising share of “AC won’t turn on” calls in San Antonio come down to a $40 thermostat, not a $4,000 compressor. We check the low-voltage wiring, confirm the thermostat is calling for cooling correctly, and replace or upgrade controls when needed. If you’re moving to a smart thermostat, we’ll verify it’s compatible with your system’s staging and heat pump configuration before installation. Bad wiring or an incompatible thermostat can cause short cycling that shortens equipment life and spikes your CPS Energy bill. Thermostat work is typically part of a diagnostic visit or runs $120 to $320 as a standalone repair.
Preventive Maintenance and Tune-Ups
The cheapest HVAC repair in San Antonio is the one you never need. Our seasonal maintenance visits include coil cleaning, condensate drain flushing, capacitor testing, refrigerant level checks, and a full system performance test. We do this twice a year: spring for the AC, fall for the heat. Homes in San Antonio’s caliche-heavy soil see faster condenser coil clogging from dust and cottonwood, and with our hard water, condensate drains clog more often than anywhere else we work. A maintained system rarely surprises you, and most of our tune-up findings are fixed for under $200 before they become $1,500 failures.
Indoor Air Quality and Duct Sealing
Your HVAC system moves air through ductwork that, in many San Antonio homes, leaks 20 to 30 percent of conditioned air into the attic before it ever reaches a vent. We test duct leakage, seal joints with mastic and mesh where accessible, and can add filtration or dehumidification if your home struggles with San Antonio’s humidity. Leaky ducts don’t just waste energy. They pull attic dust and insulation particles into your living space, which matters if anyone in the house has allergies or asthma. Duct sealing and IAQ work is quoted per project after an inspection.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for HVAC
We service every major HVAC brand installed in San Antonio homes, and we’re factory-familiar with the ones most common in this market. Carrier and Trane units are all over the north side, from Stone Oak to Timberwood Park. We know their control boards, their common failure points, and we stock the capacitors, contactors, and fan motors that keep them running. Goodman and Ruud systems dominate newer construction in the Alamo Ranch and Westover Hills subdivisions off Highway 151 and Loop 1604. These units are straightforward to diagnose, but their lower build cost means more frequent blower motor and control board failures, which we see routinely.
Lennox and Rheem are also common, especially in the 78209 and 78212 zip codes where homes were built in the 1980s and 1990s. Older Lennox systems often use proprietary parts that some contractors don’t carry, which leaves homeowners waiting days. We keep those components on our trucks because we know how many Lennox units are still running in Alamo Heights and Olmos Park. Whether your system is a Carrier, Trane, Goodman, Ruud, Lennox, or any other make, we can diagnose and repair it the same visit in most cases.
Signs You Need HVAC Right Now
- Warm air from the vents. If your AC is running but the air coming out feels warm or barely cool, the compressor may have failed, the refrigerant charge may be low, or the condenser fan may have quit. Running the system in this state stresses every component and can turn a $200 repair into a $2,000 one. This is the most common no-heat/no-cool call we get in San Antonio from June through September.
- The system turns on and off constantly. Short cycling, where the unit runs for a few minutes, shuts off, then starts again, usually points to an overheating compressor, a failing thermostat, or restricted airflow from a clogged filter or dirty coil. Your system is working harder than it should and burning electricity the whole time. If it’s the compressor cycling on its thermal overload, every cycle brings it closer to a full failure.
- Ice on the refrigerant lines or evaporator coil. Ice on an air conditioner is never normal, even in San Antonio heat. It signals low refrigerant, a dirty coil, or a blower that’s not moving enough air. The ice itself is not the problem; it’s a symptom. Turning the system to fan-only mode and calling us is the right move. If you melt the ice and keep running it, the compressor can slug liquid refrigerant and destroy itself.
- Strange noises: grinding, banging, or hissing. A properly running HVAC system makes a steady, low hum. Grinding from the outdoor condenser often means a failing fan motor or compressor bearing. Banging from the furnace usually means a delayed ignition or loose blower wheel. Hissing can be a refrigerant leak at a braze joint. Each of these gets worse the longer you wait, and each is a specific failure we can identify quickly with a diagnostic visit.
- Your CPS Energy bill jumped for no obvious reason. If your usage patterns haven’t changed and July’s bill is 40 percent above last July, your system is working against itself. Low refrigerant, failing capacitors, or a duct leak in the attic are the typical culprits. A quick performance test measures your system’s actual cooling output against its rated capacity, and the numbers usually tell us exactly where the money is going.
Our HVAC Process – Step by Step
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You call, a live person answers. No voicemail, no callback queue, no “press 2 for service.” You reach a person at (409) 215-3468 who takes your information and schedules a visit. We give you a specific arrival window, not a four-hour span. If you’re in San Antonio proper, we can often be there the same day for cooling issues.
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Diagnostic visit and system inspection. Our technician arrives in uniform with a background check on file. They’ll ask what you’re experiencing, then run through the relevant system checks: static pressure, temperature split across the coil, capacitor microfarad readings, contactor condition, and refrigerant superheat or subcooling against manufacturer specs. You’ll see the readings. We don’t keep the diagnosis a mystery.
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Written quote before any work starts. We hand you a written quote that lists the exact repair, the part cost, the labor cost, and the total. You approve it before we touch a screwdriver. If the fix is small and you want to think about it overnight, fine. If you approve it, we start right then. The price on that paper is the price you pay. It does not move.
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Repair or installation, done by the book. We carry the most common parts on the truck, so most repairs happen in the same visit. For installations, we schedule the work and show up with the equipment, the crew, and a plan. The job gets done to manufacturer spec, not “good enough.” Our techs pull permits where San Antonio code requires them, and we handle the registration paperwork for your equipment warranty.
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Clean site, tested system, written guarantee. Before we leave, we run the system through a full cycle and measure the actual temperature drop. We clean up every screw, old part, and piece of packaging. You get a written receipt and the Garrison Standard in writing: the work is guaranteed for a full year, and if it fails during that window, we come back and make it right at no charge.
How Much Does HVAC Cost in San Antonio?
A typical HVAC repair in San Antonio runs $150 to $600, depending on what failed. A capacitor replacement might be $150 to $250, while a blower motor might run $400 to $550. Full system replacements start around $5,000 for a basic 14 SEER unit in a smaller home and climb to $12,000 or more for high-efficiency variable-speed systems in larger homes. A lot depends on the equipment’s age, the brand, the refrigerant type, and whether your ductwork needs modification. Older systems running R-22 refrigerant cost more to patch because the refrigerant itself has been phased out and is now expensive. Newer R-410A or R-454B systems don’t have that problem.
What affects the price: the part that failed, the brand of your system, how hard it is to access the attic or condenser, and whether the issue is a single component or a cascade. What shouldn’t affect the price: what we think you can afford or how desperate the weather makes you. San Antonio’s biggest HVAC complaint is prices that move after the tech sees the house. Ours don’t. Every estimate is free, and it includes a written breakdown of parts and labor. Before you approve anything, you’ll know exactly what you’re paying and why. If a job needs a second visit, the price we quoted is the price we honor.
HVAC Near San Antonio – Our Service Area
Our San Antonio HVAC team covers the entire metro, from Alamo Heights and Olmos Park through Stone Oak, Alamo Ranch, Westover Hills, and down toward Lackland AFB and Fort Sam Houston. We also serve the surrounding communities within a reasonable drive of the 410 and 1604 loops. Same-day service is typical for AC repairs inside San Antonio proper, and we keep trucks stocked for the most common failures so one visit handles most jobs. If you’re in a nearby community and wondering whether we cover you, call (409) 215-3468. You can also see what else the family offers, from home services to our full HVAC in San Antonio page.
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.
Frequently Asked Questions – HVAC in San Antonio
HVAC stands for heating, ventilation, and air conditioning, and in most San Antonio homes it’s a single system that manages both cooling and heating through shared ductwork and a shared blower. The outdoor condenser unit and indoor evaporator coil handle cooling, while a furnace or heat pump handles heating, all controlled by one thermostat. In San Antonio’s hot, humid climate, your HVAC system also controls indoor humidity, which affects comfort as much as temperature. We diagnose and service the entire system, not just the box in the closet or the unit outside.
Most repairs are completed in a single visit lasting one to two hours, because our trucks carry the capacitors, contactors, fan motors, and control boards that fail most often in this market. The diagnostic itself takes 30 to 45 minutes, and then the repair depends on the part. If a specific part isn’t on the truck, we’ll tell you the timeline before you approve anything, and we usually return within 24 to 48 hours. Installations and full replacements take one to two days depending on the scope.
Most HVAC repairs in San Antonio run $150 to $600, with simple parts like capacitors and contactors on the low end and blower motors or control boards on the higher end. Full system replacements run $5,000 to $12,000 or more depending on size, efficiency, and brand. Every job gets a written quote before any work starts, and that price doesn’t change once we’re in the attic or on the roof. Call (409) 215-3468 for an exact quote, estimates are free.
Yes, we service Carrier, Trane, Goodman, Ruud, Lennox, Rheem, and just about every other brand installed in San Antonio homes. We carry common OEM and aftermarket parts for the brands we see most: Carrier and Trane on the north side, Goodman and Ruud in newer developments, Lennox in older central neighborhoods. If your unit is an uncommon make or an older model, we can still diagnose it the same visit and source parts quickly.
Yes, we answer calls 24/7 and we keep same-day availability for cooling failures in San Antonio, especially during the summer months when temperatures cross 100 degrees. A live person answers every call at (409) 215-3468, even at 3 a.m., and we’ll get a technician scheduled for the earliest available window. Cooling failures in San Antonio heat aren’t just uncomfortable, they’re a health risk for elderly residents, young children, and people with certain medical conditions, which is why we prioritize them.
Every repair and installation we perform in San Antonio is backed by the Garrison Standard: a written one-year guarantee on workmanship. If the repair fails or the installation has a workmanship issue within that year, we come back and make it right at no charge. Equipment warranties from the manufacturer are separate and typically run 5 to 10 years on parts. We register your equipment with the manufacturer so that warranty stays active. In writing, on every job. That’s the standard.
Before we arrive, clear access to your indoor air handler, usually in a closet, attic, or garage, and to your outdoor condenser unit. Move storage, boxes, or anything leaning against the equipment. If you have pets, secure them or let us know so we can work around them comfortably. Change your air filter if it’s been more than 90 days, that alone can be the fix for some airflow issues. Call (409) 215-3468 if you have questions about what we’ll need when we arrive.
Schedule Your HVAC Service in San Antonio Today
San Antonio heat doesn’t wait, and neither should you. Call (409) 215-3468 for a free estimate on any HVAC repair, maintenance visit, or system replacement. A live person answers, we schedule a specific window, and we put the price in writing before any work starts. The Garrison Standard applies to every job: the written quote, the by-the-book workmanship, and the full-year guarantee on labor. Call now, get it fixed, and get back to your life.
Written by Preston Harley, Owner at Garrison Partners, serving San Antonio since 2010.