Whether you woke up to a sweltering house or want to plan a system replacement before the old unit fails, our technicians provide dependable HVAC care for your home.
Homeowners across San Marcos count on San Marcos HVAC for residential heating and cooling work that's thorough, correctly sized for their house, and backed by years of hands-on experience in the field.
Whatever your home needs, from a simple repair to a full system replacement, you get an upfront price and work done right the first time.
No-heat calls handled fast, with a safety check on every visit.
Central air installs with the charge, airflow, and drainage verified.
Cleaner air and better airflow, with the debris actually removed.
Cold air back fast, with the common parts already on the truck.
Heating and cooling repairs on every major brand, most finished in one visit.
Targeted comfort for additions, garages, and rooms the ducts never reached.
Spring and fall maintenance that keeps efficiency up and breakdowns down.
No heat tonight? We find the failed part and get the furnace running.
Aging system? We'll show you the numbers before you decide.
Year-round heating and cooling from one efficient system.
New HVAC systems, sized, sealed, and commissioned the right way.
New furnaces installed with proper venting, gas work, and a full startup test.
Open now·Speak with someone about your HVAC needs
Homeowners across San Marcos call us for quick repairs, honest answers, and upfront pricing.
Get Help: (737) 344-9567
Your home is your biggest investment, and a failing HVAC system undermines your family's comfort every day it goes unaddressed. Left alone, a cracked heat exchanger or a clogged condensate drain can turn a comfort complaint into a safety hazard or a water-damage bill. When something goes wrong, you need a team that responds quickly, diagnoses the fault accurately, and fixes it right the first time. That's the standard San Marcos HVAC holds itself to.
Whether you're dealing with a condenser that trips its breaker, a heat pump stuck in defrost, or a mini-split flashing error codes, our seasoned technicians have the training and parts to handle just about any household HVAC challenge.
No homeowner likes a surprise on the invoice. That's why San Marcos HVAC quotes every San Marcos job upfront, after a complete diagnostic that looks at the equipment's age, fuel type, and tonnage, refrigerant levels, coil and heat exchanger condition, and the ductwork feeding each room. You'll know what's wrong, what it takes to fix, and exactly what it will cost before you say yes.
The trouble with HVAC failures is that many of them develop out of sight. A pinhole leak in the evaporator coil slowly drains refrigerant, the blower bearings wear down a little at a time, and a weak capacitor holds on until the first hot afternoon, when the compressor won't start. If your bills are climbing, airflow drops, or ice forms on the lines, have the system checked before a repair turns into a replacement.
We also help homeowners plan ahead. Most air conditioners and furnaces last 12 to 18 years, and a planned replacement is always cheaper and less stressful than an emergency swap during a heat wave or cold snap. Our technicians know the climate demands common to San Marcos and how they affect equipment life, so we can tell you honestly whether your system has years left or is living on borrowed time.
Routine maintenance is the most reliable way to keep your home comfortable year-round. Regular service prevents failures before they start, keeps coils and burners clean, and catches small faults while they're still inexpensive to fix. At San Marcos HVAC, every plan is built around your home's actual equipment, with scheduled visits that cover coil cleaning, refrigerant charge verification, capacitor and contactor testing, burner and heat exchanger inspection, condensate drain clearing, filter replacement, and a static pressure check on the ductwork.
We offer flexible maintenance options for homeowners, with spring cooling tune-ups and fall heating tune-ups for most systems. This is especially important in dusty areas, where dirty condenser coils choke heat rejection and drive up energy use. Each home is assessed individually, and the plan is tailored to your equipment's age, your household's comfort demands, and your local climate.
Consider maintenance as a safeguard for equipment you've already bought. Each tune-up helps keep the coils clean, the charge correct, and the filter fresh, which lowers monthly energy bills while easing the strain on the compressor and blower. For most households, a plan costs far less than replacing the system ahead of schedule.
An undersized system runs nonstop and never catches up on the hottest days, while an oversized one short-cycles, wastes energy, and leaves the house humid. San Marcos HVAC sizes every replacement and new installation to your actual home. That means a proper load calculation that accounts for square footage, insulation, window exposure, and duct layout, rather than simply matching the tonnage of the old unit. For ductless mini-splits, it means matching head capacity to each zone so every room holds its setpoint.
We walk you through the options for every home, especially growing families with rising comfort demands. A single-stage system that served a small household rarely satisfies a finished basement and two added bedrooms, and a modern two-stage or variable-speed heat pump can hold tighter temperatures while cutting energy use dramatically. If you're weighing furnace-and-AC against a heat pump, or ducted against ductless, our technician will lay out the honest trade-offs: SEER2 efficiency ratings, operating cost, electrical and venting requirements, and upfront installation work, so you can pick what fits your home and budget.
Repairs We HandleWarm air from the vents, a furnace that won't ignite, ice on the indoor coil, a slow refrigerant leak: each of these problems has its own cause and calls for a different repair. San Marcos HVAC diagnoses the exact fault before swapping any parts, whether it's a condenser that hums without starting, a furnace that short-cycles, a thermostat that keeps losing its program, a clogged condensate drain, or a mini-split throwing error codes.
Some problems are mostly a nuisance, while others pose real risks. A weak capacitor simply keeps the compressor from starting, but a cracked heat exchanger can leak combustion gases into your living space, and a blocked condensate drain can quietly ruin a ceiling. We match the fix to the failure: capacitors, contactors, and fan motors on cooling systems, igniters, flame sensors, and control boards on furnaces, sealed and repaired ductwork where conditioned air is bleeding into the attic, and a proper refrigerant recharge after a repaired leak. Whatever you're facing, our team has the training and parts to handle it.
Our experienced technicians find and fix heating and cooling problems at the source. Early action protects your home and saves money.
Call (737) 344-9567 TodayHVAC failures never happen at a convenient time. They show up on the hottest afternoons of summer and the coldest nights of winter, right when your family needs the system most. Same-day and emergency service from San Marcos HVAC puts an experienced technician at your door quickly, with the tools and parts to find the fault and fix it on the spot. When the system is past repair, we plan and install a correctly sized replacement without a long wait.
You get the price before any work begins, with no hidden fees. Once the job is done, the technician walks you through what was wrong, what was repaired, and how to keep your equipment healthy from here.
Lasting ResultsLong-term reliability comes from finding out why a part failed, not just swapping the part. San Marcos HVAC looks at airflow, duct design, and how the system was installed on every call, since those underlying issues are behind many repeat failures. We treat your home the way we'd treat a neighbor's, because that's what you are.
Our process is simple and proven: a thorough inspection, a clear recommendation, professional repair or installation, and honest guidance on maintenance. We handle everything from start to finish so you and your family can count on dependable comfort every day. For year-round peace of mind, ask about our seasonal maintenance plans that keep your heating and cooling covered through every season.
From a simple tune-up to a complete system replacement, we're ready to help throughout San Marcos.
Get Help: (737) 344-9567