San Marcos is a city with a wide range of housing, from older homes on their original equipment to newer construction that came with a matched system already installed. Student rental properties, single-family homes, and small commercial buildings each put different demands on heating and cooling equipment. Some properties have systems that have never been properly serviced. Others have had work done by whoever was available at the time, and the results vary. We handle all of it, from a straightforward repair to a full system replacement, and the diagnosis explained on every call means you know what the job involves before anything is scheduled.
The mix here also includes properties where additions were built without extending the ductwork properly, and older units where the condenser and air handler are mismatched because one half was replaced years ago without the other.
Call us at (830) 632-8965 and we will scope the job on the phone before anything is booked. We are available every day from 6:00 AM to 9:30 PM.
Second opinions are a normal part of this work, and we take them seriously. When a system has already been looked at and the problem came back, or when a quote for replacement does not sit right, a second set of eyes on the equipment is worth the call. We go through the system from the beginning rather than picking up where someone else left off.
That matters because a repair that addressed a symptom without finding the cause tends to fail again. A refrigerant charge that keeps dropping means there is a leak somewhere. A furnace that keeps tripping its limit switch is overheating for a reason. We look for the cause, not just the reading that is out of range. Nothing gets replaced before you know why.
If work was started and not finished, or if a part was installed that did not resolve the fault, we can assess what is there and give you a clear picture of what it will take to get the system running correctly. No pressure and no gimmicks, just straight HVAC answers.
When certain rooms are not getting air, or the airflow from the registers feels noticeably weaker than it used to, the cause is usually in the ductwork, the blower, or the coil. A blower motor that is drawing high amperage but not moving enough air, an evaporator coil that has built up enough debris to restrict the airstream, or a duct that has separated from its connection are all common findings. We work through the air-side of the system to find where the restriction is before any part is quoted.
A furnace that starts and then shuts off almost immediately, or one that attempts to light several times before failing, is usually dealing with an ignition fault or a flame sensor that has accumulated enough buildup to stop reading correctly. Cleaning the sensor is sometimes all it takes. In other cases the igniter itself has cracked or the gas valve is not opening fully. The diagnostic covers both the ignition sequence and the safety controls that shut the furnace down when something reads outside its normal range.
Short cycling, where the system starts, runs briefly, and shuts off before the space reaches the set temperature, puts more wear on the compressor and the heat exchanger than almost any other fault. It can come from a refrigerant charge that is off, an oversized system that satisfies the thermostat sensor before the air in the room has actually moved, or a safety switch that is tripping because of restricted airflow. The fix depends on which of those is driving it, and that is what the diagnostic is for.
A heat pump that is not switching between heating and cooling modes, or one that is running but not conditioning the air, is usually dealing with a reversing valve fault or a refrigerant issue. In heating mode, a heat pump that ices over heavily and does not clear itself has a defrost control problem. The defrost cycle is designed to run automatically, and when it does not, the outdoor coil can build up enough ice to stop the system from moving heat at all. We test the defrost board, the sensor, and the reversing valve before any component is replaced.
Conditioned air that escapes into an attic or a wall cavity before it reaches the living space is money spent heating or cooling a space that does not need it. In a property where the ductwork has not been looked at in years, the losses can be significant enough to show up on the utility bill before they show up as a comfort complaint. Rooms that are always harder to heat or cool than the rest of the house are often the first sign.
Duct sealing and repair does not require pulling the house apart. Accessible joints and connections can be sealed from inside the duct system. Where a section has separated or collapsed, it can be repaired or replaced without a full ductwork replacement. Airflow balanced rather than left to chance means we assess what the system is actually delivering at each register, not just what the equipment is rated to move. That distinction matters when the complaint is uneven temperatures rather than a system that has stopped working entirely.
Zoning and comfort-control systems are also worth discussing where the layout of a property makes a single thermostat a poor fit. A two-story home, a property with a finished basement, or a building where one section runs warm and another runs cold can often be addressed with zone controls that let different areas of the property operate independently.
When a property has no heating or no cooling, the call gets treated as urgent. We take emergency no-heat and no-cool calls every day from 6:00 AM to 9:30 PM, and short-notice work is something we take on regularly. We do not quote arrival windows, but emergency calls are prioritized over routine appointments.
For scheduled work, the process starts on the phone. We go through what the system is doing, what equipment is involved, and what the visit will cover. The price is confirmed before anything is booked. Tenants and businesses that need to stay open during a service visit are a normal part of the work, and we account for that when scoping the job.
Plain questions. Honest diagnosis. Clear options.
Seasonal maintenance and tune-ups can be booked in advance, and the right time to schedule a cooling tune-up is before the long warm season begins rather than after the first hot week. A heating tune-up is best done before the first cold front, when the system has not been run in months and any faults that developed over the summer are about to matter. If you want to see the whole range first, try the list of HVAC services we handle.
The price depends on what the job turns out to be. A diagnostic visit, a refrigerant leak repair, a duct sealing job, and a full system replacement are different scopes with different pricing, and the rate is confirmed on the call before anything is scheduled. What moves a quote are the fault itself, whether the equipment can be reached easily, and whether a repair is the right answer or replacement is the better call given the age and condition of the system.
For a repair, the cost reflects the component involved and what it takes to get to it. For a replacement, system sizing, equipment selection, and what the existing setup requires all factor in. We give you the rate on the phone before the visit is booked, and you can ask what the visit covers and get a straight answer.
We do not carry out work and then present a bill for something different from what was discussed. The scope is set before the job starts. If the diagnostic turns up something beyond what was covered on the call, that gets explained before any additional work is done.
We cover San Marcos and the surrounding area across Hays County. That includes Redwood, Martindale, Kyle, Staples, and Uhland. If your address is outside San Marcos and you are not sure whether it falls within the service area, a quick call will confirm it.
Calls about properties in this area are answered by someone who knows the trade and can scope the job on the phone. Residential and commercial work alike, the process is the same: the job is scoped on the call, the price is confirmed before the visit, and nothing moves forward until you know what you are agreeing to.
Generally, no. Closing vents increases static pressure in the duct system, which can reduce airflow, strain the blower, and cause the system to work harder rather than less. A properly designed zoning system is the right way to condition only the spaces that need it.
Intermittent faults require the system to be running and ideally reproducing the problem during the visit. Telling us when the fault tends to occur, whether it is related to outdoor temperature, how long the system has been running, or the time of day helps us plan the diagnostic approach. Some intermittent faults only show under specific load conditions, and the technician runs the system accordingly.
If the repair requires a part that is not available immediately, we explain that on the call and confirm the next step before anything is left open. Timing depends on the part and the supplier, and we will tell you what we know rather than guessing at a date.
We approach those calls the same way: the technician runs the system through a full cycle and monitors performance rather than checking it cold and calling it done. Intermittent faults, like a capacitor that fails under load or a refrigerant issue that only shows at operating temperature, require the system to be running before the cause becomes visible.
Yes. Thermostat and smart-control replacement is a standalone service. Whether a new control is compatible with the existing equipment is something we work out on the call, and the installation is straightforward in most cases.
Rental properties tend to accumulate deferred maintenance, and the most common calls involve systems that have not had a seasonal tune-up in several years, evaporator coils that have not been cleaned, and ductwork that has separated at connections over time. Short cycling and weak airflow are the symptoms that surface most often, and both trace back to underlying issues that a proper diagnostic will identify. The repair-versus-replace question also comes up more frequently in rental stock, where equipment age and condition vary widely.
Yes, that is a normal part of how we schedule commercial and rental property work. We confirm the scope and timing on the call so the visit fits around whoever is in the building. For emergency no-heat or no-cool situations, we prioritize getting the system running with as little disruption to the occupant as possible.
When there is no heat or no cooling and the property cannot wait, call (830) 632-8965.
We are available every day from 6:00 AM to 9:30 PM, and emergency calls are handled as a priority. Call New Braunfels HVAC Company, ask what the visit covers, and get a straight answer before anything is scheduled.
HVAC service covers these nearby towns as well: Redwood, Kyle, Wimberley, Buda. Have a look at our complete coverage area.
From a quick AC repair to a full system replacement, we handle the heating and cooling work that keeps San Marcos homes and commercial buildings running through long Texas summers and the cold fronts that follow. The services below cover the full range of what we do, along with what each visit includes, who it fits best, and a practical note on timing or value. Call us with any questions and we will walk through the options before anything is scheduled.
| HVAC Service | What It Covers | When You Need It | What to Keep in Mind |
|---|---|---|---|
| Whole-Home Dehumidification & Humidity Control | Dehumidifier sizing and selectionAir handler integrationHumidity target settingSystem test across the full home | Hays County homes where indoor air feels heavy or musty even when the AC is running | High indoor humidity in this region can persist through spring and fall even when temperatures are manageable. A whole-home unit operates independently of the cooling cycle and holds humidity to a set target. |
| Full System Installation & ReplacementMost Popular | Load calculation and proper sizingMatched condenser, air handler, and coilRefrigerant line and electrical connectionsSystem testing and airflow verification | Homeowners whose system is aging, requiring repeated repairs, or no longer keeping up with the cooling load | Replacing components from the same equipment generation keeps efficiency ratings accurate and avoids compatibility problems that come from mixing old and new hardware. |
| Heating & Furnace Repair | Ignition system checkLimit and pressure switch testingBlower motor assessmentHeat exchanger inspection | Homes relying on gas furnaces when a cold front moves through Hays County | Furnace calls spike after the first cold snap of the season. Scheduling a check before that window keeps the repair from competing with emergency demand. |
Call us at (830) 632-8965 and we will go through the details, confirm the price, and get the right service scheduled for your home or building.
(830) 632-8965