HVAC San Antonio, TX

Professional HVAC Service in San Antonio

When you need a dependable heating and cooling company in San Antonio, San Marcos HVAC is the name to call. We've been keeping local homes and businesses comfortable year after year, earning repeat business one job at a time. Our technicians are local, not dispatched from across the state, which means faster response times and a real understanding of the climate patterns, housing stock, and ductwork quirks that shape how HVAC systems here perform and fail.

From a single no-cool emergency to complete system replacements, ductless mini-split installations, and seasonal maintenance programs, our team handles every kind of residential and commercial heating and cooling need. We offer prompt service and give you upfront pricing before any work begins, no hidden fees, ever. Our trucks are stocked with the parts that fail most, capacitors, contactors, igniters, flame sensors, blower motors, and thermostats, so most repairs are finished in a single visit.

Whether your air conditioner is tripping the breaker, your furnace is clicking but never lighting, or you're simply planning ahead for a system past its prime, one call to (737) 344-9567 gets a skilled local technician headed your way with everything needed to diagnose the problem the same day whenever possible.

Full-Service HVAC Care for San Antonio Homes and Businesses

We service every type of heating and cooling equipment you'll find in local homes and businesses, from central air conditioners and gas furnaces to heat pumps and ductless mini-splits. It doesn't matter whether the building is a single-family house, a townhome, or a storefront. Our techs understand the local weather, the way homes here were built, and the code requirements that apply to new installations, which pays off in every diagnosis.

On the residential side, we handle everything from quick fixes, like a failed capacitor, a burned contactor, a dirty flame sensor, or a seized blower motor, to refrigerant leak repair, full system change-outs, and ductless additions. We size every new system with a proper load calculation rather than guesswork, so you get even temperatures and sensible utility bills instead of a unit that short-cycles itself to an early death. Seasonal maintenance visits clean coils, verify refrigerant charge, test safety controls, and check static pressure, the single best way to extend equipment life.

Commercial work is a big part of what we do too. We maintain and repair rooftop units, split systems, and ventilation equipment for restaurants, shops, offices, and multi-unit properties, and we know that every hour of downtime hurts your bottom line. To keep disruptions short, we carry common parts on every truck, diagnose quickly, and schedule repairs around your operating hours whenever possible.

When Your System Fails in San Antonio

Heating and cooling failures rarely wait for a convenient day, which is why we offer fast, flexible scheduling for most situations. When you call, you'll speak with a real person who will get a technician headed to your property without delay. Arrival in the area is typically within a day for urgent calls, and a dead AC in a heat wave or a furnace out on a freezing night is exactly the kind of call we move to the front of the line.

The urgent calls we run usually follow a pattern. On the cooling side, it's an AC blowing warm air, an outdoor unit that hums without starting, or an evaporator coil frozen solid. On the heating side, it's a furnace that lights and then shuts down. And any time of year, it's breakers that trip whenever the system starts, clogged condensate drains backing water into the furnace cabinet, and thermostats that stop responding. Since our trucks are stocked with capacitors, contactors, igniters, flame sensors, universal control boards, and fittings, the majority of these calls are wrapped up on the first trip, at a price you approve before we start.

If your AC has iced over, the best thing you can do before we arrive is switch the system off at the thermostat and set the fan to "on" so the coil can thaw. Running it frozen can flood the drain pan and damage the compressor. If a furnace is short-cycling or you smell something burning, turn it off at the service switch and call (737) 344-9567. A few minutes of caution can prevent a much larger repair.

Keeping Your San Antonio HVAC System Running Longer

Many mid-season breakdowns start with maintenance that never happened, and the habits that prevent them are simple. Swap your filter every one to three months, clear vegetation at least two feet from the outdoor condenser, and rinse the condenser coil every spring. Then book a professional tune-up each spring and fall, one for cooling and one for heating, so our technicians can catch small problems while they're still cheap to fix.

Take a look at the age of your system. Its age says a lot about what comes next. With regular service, most air conditioners make it to 12 to 15 years, gas furnaces 15 to 20, and heat pumps 10 to 15. If your system is beyond that range and also shows rising bills, rooms that never quite reach temperature, or frequent repairs, it's usually due for a planned replacement, and that's almost always cheaper and easier on everyone than an emergency replacement in peak season.

Minor issues rarely stay small for long. Consider a weak capacitor: swapping it out is a quick, inexpensive repair, but left alone for a season, it can burn out the compressor, and suddenly a minor fix has become a full system replacement. That's why we encourage homeowners to save our number in their phone and call at the first hint of trouble. Catching it early saves time and money and spares you a miserable night.

Comfort Challenges San Antonio Homeowners Face

The service calls we run around here follow familiar patterns. In summer it's warm air from the vents, weak capacitors that finally quit on the first hot week, and condensate drains backing up into the furnace cabinet. In winter it's furnaces that short-cycle, dirty flame sensors, and igniters that fail on the first cold night. Year-round we see clogged filters choking airflow, rising energy bills from dirty coils, and ductwork that leaks conditioned air into attics and crawlspaces. All of them start small, and all of them cost less to fix early. If your system is showing symptoms, call (737) 344-9567 before the season turns it into an emergency.

What We Offer

We offer comprehensive heating and cooling solutions for area homes and businesses, including:

The Reason San Antonio Keeps Calling Us

Choosing an HVAC company comes down to trust, and trust is earned on the job. San Marcos HVAC earns it by fixing what's fixable instead of replacing what isn't, by sizing replacements with real load calculations instead of guesswork, and by standing behind every repair long after the visit ends. Same-day service is available for most calls, and each visit wraps up with the system tested and your questions answered.

HVAC FAQ for Local Residents

Also Serving Nearby Communities

Our technicians work throughout the surrounding region. See the other areas we serve.