Universal City HVAC Company handles heating and cooling work for homes and businesses across Universal City and the surrounding Bexar County area. Whether the AC stopped cooling in the middle of a Texas summer or the furnace quit on a cold January night, we take the call and get the job scoped. Residential and commercial customers are welcome. We are available every day from 5:30 AM to 8:30 PM.
Call (830) 590-9289 to get a quote.
Furnace fixed. AC humming. Home comfortable again.
Some homes need a full system replacement. Others just need a tune-up. We handle the full range of residential and commercial HVAC work, from a quick diagnostic on a unit that stopped cooling to a complete system installation on a new build. Here is what that looks like in practice.
When the AC is blowing warm air, cycling on and off without cooling the house, or not turning on at all, the cause is not always obvious from the outside. A service visit covers the full system: thermostat signal, refrigerant charge, condenser coil condition, compressor operation, and airflow through the air handler. We check what the system is doing before recommending any repair. We'll explain the diagnosis before any work is authorized.
A furnace blowing cold air, short cycling, making a banging or rattling sound, or simply refusing to start all point to different problems. Some are straightforward. Others take a careful look at the heat exchanger, the igniter, the pressure switches, and the airflow path. Whatever the symptom, the visit covers a full check of the system before any parts are quoted.
A heat pump that is not heating in winter or not cooling in summer may have a refrigerant issue, a reversing valve problem, or a defrost cycle fault. The diagnostic process is different from a standard furnace or AC call, and the repair-versus-replace question comes up more often as units age. We scope the system on the call so you know what to expect before the visit.
A thermostat that is not responding, not holding a schedule, or not communicating with the air handler can look like a system failure when the fix is simpler. We install programmable and smart thermostats on existing systems and confirm the thermostat is communicating correctly before sign-off. If the unit needs a new control, we walk through the options on the call.
Uneven temperatures from room to room, weak airflow at the vents, and rooms that never quite reach the set temperature often point to the duct system rather than the equipment. Leaky ducts push conditioned air into wall cavities and attic spaces instead of into the living area. Duct sealing and repair address the delivery side of the system, which is worth checking before replacing equipment that may be working fine.
Air filtration and whole-house air quality systems work alongside the existing HVAC equipment to reduce airborne particles, allergens, and contaminants. Installation involves connecting the filtration unit to the air handler and confirming it is drawing air through the filter media correctly. We'll get your comfort back on track.
A pre-season tune-up before the cooling season starts, or a fall check before the furnace runs hard, catches small problems before they become expensive ones. In the South Texas heat cycle, an AC system that runs from April through October works hard. A maintenance visit covers coil cleaning, refrigerant pressure, electrical connections, and a check of the drain line and blower.
Universal City sits in a climate that demands real performance from both sides of the HVAC system. Summers are long, hot, and humid. Winters are mild but not absent. The equipment here runs hard, and the humidity adds a layer of comfort and air quality work that is not as common in drier parts of the country. These three services come up regularly in this area for that reason.
When a system has been repaired multiple times, is more than fifteen years old, or can no longer hold the set temperature through a South Texas afternoon, replacement is often the more practical answer. The question is not just which unit to buy but what size the space actually needs. Equipment sized for the space rather than for the last unit is the starting point for a replacement that performs correctly. We cover the full scope on the call: what the existing system is doing, what a replacement would involve, and what the options look like.
Universal City's mild winters and heavy cooling load make heat pumps a practical fit. A heat pump handles both heating and cooling from a single outdoor unit, which simplifies the system and reduces the fuel demand during the heating months. Ductless mini-split installation is an option for additions, converted spaces, or rooms that the existing duct system does not reach well. We walk through the layout and the equipment options before anything is scheduled.
Bexar County summers bring humidity that an air conditioner alone does not always handle. When the AC is keeping the temperature down but the air still feels heavy and damp, a whole-home dehumidifier works alongside the existing system to pull moisture out of the air independently of the cooling cycle. Installation connects the dehumidifier to the air handler and the existing duct system. The result is a space that stays comfortable at a higher thermostat setting, which also reduces the load on the AC. Reach out and we'll work out what it needs.
Whether this is your first HVAC repair or your tenth, the process is the same: we scope the job, confirm the price, and schedule the visit. For homeowners, that means repair, maintenance, and system replacement for central air, heat pumps, and ductless systems. For landlords and property managers, it means getting a unit back online quickly and having clear notes on what was found and what was done, so there is a record for the property file.
Commercial customers in Universal City, from office buildings to retail spaces to multi-unit properties, get the same full-service approach. Commercial AC repair, commercial heating service, and system replacement for larger spaces all fall within what we handle.
Residential HVAC. Commercial HVAC. One number for both.
Give us a call and we will take care of it.
This area runs every kind of furnace, AC, and heat pump, and any of them can stop working at the wrong time. No heat in the house on a cold night, or no cooling when the temperature is climbing past 100 degrees, is not something that waits until Monday. We take emergency calls every day from 5:30 AM to 8:30 PM. When you call, we gather the details on the system and what it is doing, so the visit can be scoped before anyone is dispatched. We'll explain the diagnosis before any repair is authorized.
Ready to get the comfort back? The first step is a call. We ask about the system, the symptoms, and what the space looks like, and we give you a price before anything is scheduled. The rate is given on the call, before anything is scheduled.
For repair calls, that means a diagnostic fee is confirmed up front, and the repair cost is quoted after the system has been checked. For replacement, we talk through the equipment options and the scope of the installation before a number is put on it. If you are weighing repair against replacement, that is a conversation worth having on the call rather than after a technician is already on site.
The diagnosis is explained before any repair is authorized. You decide what happens next.
We cover Universal City and the communities nearby, including Schertz, Converse, Live Oak, Kirby, Selma, Windcrest, and the northeast San Antonio corridor. If you are near Randolph AFB or elsewhere in Bexar County and need heating or cooling work, call and we will confirm coverage for your address.
Universal City's long cooling season and mild winters make heat pumps a practical fit. A heat pump handles both heating and cooling from a single outdoor unit, which removes the need for a separate furnace in most cases. Installation covers unit selection and sizing, refrigerant line set, air handler pairing, and thermostat configuration, with the thermostat confirmed as communicating before sign-off.
A whole-home dehumidifier connects directly to the air handler and the existing duct system, pulling moisture from the air independently of the cooling cycle. In a South Texas summer, the AC may keep the temperature down while the air still feels heavy and damp. Adding a dehumidifier addresses the humidity side of the comfort problem without requiring a separate room unit in every space.
Repeated repairs on the same component, a system that is more than fifteen years old, or a unit that can no longer hold the set temperature through a South Texas afternoon are all signs that replacement is worth considering. The age of the system changes the answer, and that gets said on the call rather than after a technician is already on site. A replacement starts with a load calculation to size the new equipment for the actual space.
A visit to the air handler covers the evaporator coil condition, blower motor operation, filter status, and the drain line for blockages. The technician also checks the refrigerant pressure at the service ports and reviews the electrical connections at the unit. Before the visit closes, the thermostat is confirmed as communicating with the system end to end.
Uneven temperatures usually point to the duct system rather than the equipment itself. A duct that has separated at a joint, a damper stuck in the wrong position, or a register that is blocked or undersized for the room can all cause one space to be consistently uncomfortable. A duct inspection identifies where the delivery problem is before any sealing or repair work is recommended.
A frozen coil blocks airflow through the air handler, which means the system runs but delivers little or no cooling to the house. The cause is usually low refrigerant, restricted airflow from a dirty filter, or a blower motor that is not moving enough air. If you notice ice on the indoor unit or the refrigerant lines, turn the system to fan-only mode and call us so the coil can thaw before the diagnostic begins.
Short cycling, where the furnace turns on and shuts off before the house reaches the set temperature, can come from a tripped limit switch, a dirty flame sensor, or an airflow restriction. Cold air from a running furnace often points to an ignition problem, a failed flame sensor, or a heat exchanger issue. The diagnostic covers all of these before any repair is quoted.
A system that runs constantly without reaching the set temperature, one that cycles on and off more frequently than it used to, or one that has needed multiple repairs in the past two years is showing signs of age or capacity problems. Rising energy costs without a change in usage are another indicator. A system replacement starts with sizing the new equipment for the actual space, not matching the capacity of whatever came out.
A replacement visit starts with a load calculation to determine the right equipment size for the space. The existing equipment is removed, the new unit is set in place, refrigerant lines and low-voltage wiring are connected, and the system is started up and tested. The thermostat is confirmed as communicating correctly before the visit closes, and you receive clear notes on what was installed and what was done.
Emergency calls are answered every day from 5:30 AM to 8:30 PM. When you call, we gather the details on the system and what it is doing so the visit can be scoped before anyone is dispatched. We do not promise a specific arrival window, but emergency calls are handled as quickly as the schedule allows.
If the system has stopped cooling, turn it off at the thermostat rather than letting it run and risk further damage. If the furnace is not heating, check that the filter is not completely blocked and that the thermostat has power. Do not attempt to open the equipment or bypass any controls while waiting for the visit. Describe what the system was doing when it stopped when you call, since that detail helps scope the visit.
Someone with access to the equipment and the ability to authorize the work needs to be present. For residential calls, that is typically the homeowner or a designated adult. For rental properties, a property manager can arrange access, but the repair scope and the price need to be confirmed with whoever is authorizing the work before anything is started.
Ready to get the comfort back?
Call (830) 590-9289 to reach someone who knows the trade and can scope the job on the phone. We are available every day from 5:30 AM to 8:30 PM.
Simple booking. Clear pricing. Plain talk about the system.
We handle the full range of heating and cooling work for homes and businesses across Universal City and the surrounding Bexar County area. Whether the system needs a quick repair, a seasonal tune-up, or a full replacement, the scope is confirmed before anything is scheduled. The table below covers what each service involves, who it fits best, and a practical note worth knowing before you call.
| System Service | What It Covers | When You Need It | What to Keep in Mind |
|---|---|---|---|
| Ductwork Repair & Sealing | Duct inspection for separations and leaks, Sealing of joints and connections, Airflow balance across the system | Homes with uneven temperatures from room to room, weak airflow at vents, or rooms that never reach the set temperature | Leaky ducts push conditioned air into attic and wall spaces instead of into the living area, which is worth checking before replacing equipment that may be working correctly |
| Heat Pump Installation | Outdoor unit placement and refrigerant line set, Air handler pairing, Ductless mini-split option for additions or converted spaces | Homes replacing a separate furnace and AC with a single system, or adding cooling to a room the existing ducts don't reach | Universal City's mild winters and heavy cooling load make heat pumps a practical fit, since one unit handles both seasons |
| Full System Installation & ReplacementMost Popular | Load calculation and equipment sizing, Removal of existing unit, Startup testing and thermostat confirmation | Systems that are more than fifteen years old, have needed repeated repairs, or can no longer hold the set temperature | Equipment sized for the actual space, not just matched to the last unit, is the starting point for a replacement that performs correctly in Universal City's long cooling season |
| Heating & Furnace Repair | Heat exchanger and igniter inspection, Pressure switch and airflow path check, Full system diagnostic before parts are quoted | Households where the furnace is blowing cold air, short cycling, or making unusual sounds | Bexar County winters are mild but real, and a furnace that sat unused through summer can develop igniter or sensor faults before the first cold night |
| Seasonal Maintenance & Tune-Ups | Coil cleaning and refrigerant pressure check, Electrical connections and blower inspection, Drain line and filter review | Homeowners who want to catch small problems before the cooling or heating season begins | An AC that runs from April through October in South Texas works harder than most, and a pre-season check is the most practical way to avoid a breakdown in peak heat |
| Whole-Home Dehumidification & Humidity Control | Dehumidifier connection to air handler and duct system, Independent moisture removal from the cooling cycle, Comfort adjustment at a higher thermostat setting | Homes where the AC holds the temperature but the air still feels heavy and damp through a Bexar County summer | A whole-home dehumidifier reduces the load on the AC, which can lower runtime and extend the life of the cooling equipment |
| AC Repair & Service | Thermostat signal and refrigerant charge, Condenser coil and compressor check, Airflow through the air handler | Homes or businesses with an AC that stopped cooling, cycles oddly, or won't turn on | In South Texas, AC problems that show up in spring often trace back to coil buildup or low refrigerant from the previous season's run |
| Heat Pump Repair & Service | Refrigerant charge and reversing valve check, Defrost cycle diagnostic, Repair-versus-replace assessment | Homes with a heat pump that is not heating in winter or not cooling in summer | The diagnostic process for a heat pump differs from a standard AC or furnace call, so describing the symptom clearly on the phone helps scope the visit |
| Indoor Air Quality & Air Filtration | Whole-house filtration unit connected to air handler, Airborne particle and allergen reduction, Filter media airflow confirmation | Households concerned about dust, allergens, or air quality during long periods of closed-window AC use | In a climate where windows stay closed from April through October, the air inside circulates through the HVAC system repeatedly, making filtration more impactful than in milder regions |
| Thermostat & Smart-Control Installation | Programmable and smart thermostat installation, Air handler communication check, Control options reviewed on the call | Homes where the thermostat is not holding a schedule, not responding, or not communicating with the system | A thermostat that appears to be failing can sometimes point to a wiring issue at the air handler rather than the control itself |
| Emergency HVAC Service | Call intake and system scoping, no-heat and no-cool situations, urgent calls answered when the system is completely down. | Any situation where the system is completely down and waiting is not an option | When you call, we gather details on the system and the symptoms so the visit can be scoped before anyone is dispatched |
How do I know whether my AC problem is a refrigerant issue or an airflow problem?
Both can cause poor cooling, but they show up differently. Low refrigerant often means the system runs continuously without bringing the temperature down, and the air coming from the vents may feel slightly cool but not cold. An airflow problem, such as a clogged filter or a blower running slowly, tends to reduce the volume of air moving through the system rather than its temperature. A service visit covers both sides of the diagnosis before any repair is quoted.
What strange noises from an HVAC unit are worth calling about?
A banging or clanking sound from the furnace often points to something loose in the blower assembly or a problem with the heat exchanger. A rattling sound from the outdoor AC unit can mean debris inside the cabinet or a failing fan motor. A high-pitched squealing from either unit usually involves a belt or bearing. Any of these are worth a call, since running the system through a noise that is getting worse tends to turn a smaller repair into a larger one.
How does a dirty filter or coil affect system performance?
A clogged filter restricts the airflow the system needs to move heat in or out of the space, which forces the blower to work harder and reduces how effectively the coil can do its job. A dirty evaporator coil can ice over, which blocks airflow entirely and leaves the system running without delivering any cooling. Replacing the filter regularly and keeping the coil clean are the two most straightforward ways to protect the equipment between service visits.
Diagnosis Explained Before Any Repair
We check what the system is doing and walk through what we found before any repair work is authorized. You decide what happens next.
What does a seasonal tune-up actually cover, and is it worth scheduling every year?
A tune-up covers the mechanical and electrical condition of the system at the start of the season it is about to work hardest. For an AC in South Texas, that means coil cleaning, refrigerant pressure, electrical connections, blower operation, and a check of the drain line and filter. For a furnace, it means the igniter, flame sensor, heat exchanger, and airflow path. A system that runs from April through October in this climate works hard enough that catching a developing problem in March is worth the visit.
What does a thermostat or smart-control upgrade actually involve?
Installation covers removing the existing control, connecting the new thermostat to the low-voltage wiring at the air handler, configuring any scheduling or connectivity features, and confirming that the thermostat is communicating correctly with the system before we leave. Some older systems use wiring configurations that limit which smart thermostats are compatible, so it helps to describe the existing setup when you call so we can confirm the right option before the visit.
How do ductwork leaks raise energy bills, and how is the problem found?
When ducts separate at joints or develop gaps, conditioned air escapes into the attic or wall cavities before it reaches the living space. The system runs longer to compensate, which shows up on the energy bill. The problem is found by inspecting accessible duct runs for visible separations, checking airflow at the registers, and comparing what the system is producing against what is arriving at the vents. Sealing the leaks addresses the delivery problem without touching the equipment.
System Checked Before Parts Are Quoted
No repair is quoted until the full system has been inspected. That keeps the estimate tied to what the job actually involves rather than what it looks like from the outside.
Is older equipment worth repairing, or is replacement the better call?
The answer depends on the age of the system, the cost of the repair, and how the equipment has been performing. A repair on a system that is eight years old and otherwise in good shape is usually worth doing. The same repair on a fifteen-year-old unit that has already had several service calls in the past two years is a different calculation. We scope the system and explain what we found before any repair is authorized, so you have the information to make that call rather than having it made for you.
What causes a system to short-cycle, and is it harmful to the equipment?
Short cycling, where the system turns on and shuts off before the space reaches the set temperature, can come from a tripped limit switch, a dirty flame sensor, a refrigerant pressure issue, or a system that is oversized for the space. Running through repeated short cycles puts extra wear on the compressor and the blower motor, so it is worth diagnosing rather than ignoring. The visit covers the full sequence of what the system is doing before any part is quoted.
Findings Written Up After the Visit
After the work is done, you get clear notes on what was found and what was done. That record matters for rental properties, insurance documentation, and the next service call.
How do indoor air quality and humidity control actually improve comfort in this climate?
In Bexar County, the summer humidity is high enough that an air conditioner can hold the temperature at the set point while the air still feels heavy and uncomfortable. A whole-home dehumidifier connected to the air handler pulls moisture from the air independently of the cooling cycle, which means the space feels comfortable at a higher thermostat setting. Air filtration works alongside the existing system to reduce the airborne particles that circulate through a home that keeps its windows closed from April through October.
How long does a full system replacement typically take?
Most residential replacements are completed in a single visit. The existing equipment is removed, the new unit is set in place, refrigerant lines and low-voltage control wiring are connected, and the system is started up and tested. The thermostat is confirmed as communicating with the system before the visit closes. Larger commercial replacements or installations that involve ductwork changes may take longer, and the scope is confirmed on the call before anything is scheduled.
What is the difference between choosing a furnace and choosing a heat pump for this area?
A furnace burns fuel to produce heat and pairs with a separate AC for cooling. A heat pump handles both heating and cooling from a single outdoor unit by moving heat rather than generating it, which is efficient in climates where winters are mild. Universal City's heating season is short and relatively mild, which means a heat pump rarely has to work at the edge of its capacity for heating, while its cooling performance matches a standard AC. The choice depends on the existing system, the fuel available at the property, and what the replacement is replacing.
Call (830) 590-9289 to talk through what the system is doing and get a price before anything is scheduled.
(830) 590-9289