Manuel Serrano HVAC Mechanical has been serving Universal City and the surrounding Bexar County area since 2016. What started as a commitment to honest, hands-on heating and cooling work has grown into a trusted local operation that handles everything from a quick AC repair to a full system replacement. We work with homeowners who want a straight answer and property managers who need reliable scheduling and clear cost communication. Hire us and you're hiring a neighbor who knows your home. Whether your system stopped cooling on a July afternoon or your heat gave out on a cold January night, we show up, we diagnose it correctly, and we get it handled. Heat restored. Cooling dialed in. Comfort back. Call us today to schedule service or request a quote at (830) 590-9289.
We've handled everything from a quick tune-up to a full system swap, and the scope of what we do covers the full range of residential and commercial HVAC needs. AC repair and service, furnace repair, heat pump installation and repair, ductwork repair and sealing, thermostat and smart-control installation, indoor air quality and air filtration, emergency no-heat and no-cool calls, and seasonal maintenance are all part of our regular work. This is the kind of HVAC work neighbors pass along by word of mouth, and we take that seriously on every job.
For homeowners, we handle the everyday heating and cooling work that keeps a house comfortable year-round. That includes AC repair and service, heating and furnace repair, heat pump service and installation, full system replacement, thermostat upgrades and smart-control installation, ductwork repair and sealing, and indoor air quality improvements including air filtration. For room additions, garages, or spaces without existing ductwork, mini-split and ductless systems are a practical option we install and service regularly. We'll get your home comfortable again fast.
Property managers, office buildings, and retail spaces have different demands than a single-family home. Downtime costs money, and scheduling matters. We offer commercial AC repair, commercial heating repair, and commercial HVAC installation and replacement with the same honest cost communication we bring to every residential job. Before any work begins, we walk you through what we found and what it will cost. Call today and we'll set up your appointment.
If you've never hired an HVAC company before, the first thing you want to know is whether you can trust the person walking into your home or building. We are a family-run heating and cooling business, and that shapes how we operate at every level. Calls get answered by someone who knows the work and knows the area. Jobs get done by technicians who treat your property with care. That accountability does not disappear once the invoice is paid.
Bexar County's climate puts a real demand on cooling systems. Summers here are long and intense, and an AC unit that is struggling in April will likely fail in August. We give honest recommendations on repair versus replacement, never an upsell. If your system has useful life left, we will tell you. If it makes more financial sense to replace it, we will explain why and let you decide. We also carry that same approach into heating season. The winters in this area are mild compared to much of the country, but a furnace or heat pump that quits on a cold night still needs attention fast.
Same-day service options and 24/7 emergency availability mean you are not waiting days for help when your system goes down. Right diagnosis. Right repair. Right on the first visit.
When the technician arrives, the real work begins, and that means a thorough diagnosis before any repair recommendation is made. We check refrigerant levels and look for leaks, assess airflow and identify the cause of uneven temperatures, inspect the condenser and compressor, and evaluate the air handler and blower. Every finding gets explained in plain language before any work starts, and pricing is communicated clearly upfront so there are no surprises on the final bill.
All work is performed by qualified HVAC technicians who know the equipment and know how to get it right the first time. Whether we are replacing a worn-out component or walking a customer through a full system installation, the standard is the same: do it correctly, explain what was done, and leave the system running the way it should. Give us a call and we'll get the comfort back.
In the Texas heat, a no-cool situation is not a minor inconvenience. Temperatures inside an unconditioned home can rise fast, and waiting days for a technician is not an acceptable answer. We offer same-day scheduling options and after-hours availability, including weekends, for exactly these situations. The same applies when a cold snap moves through Bexar County and a furnace or heat pump stops producing heat. We are available around the clock for emergency HVAC calls, and we respond with the urgency the situation calls for. Call and we'll get the air running right.
Don't let a small problem turn into a no-heat night or a no-cool afternoon. Seasonal maintenance is the most reliable way to catch issues before they become emergency repairs. In the spring, we prepare cooling systems for the heavy workload ahead: checking refrigerant charge, cleaning evaporator coils, testing electrical components on the unit, and inspecting air filtration. In the fall, we shift to heating tune-ups and furnace checks to make sure everything is ready before temperatures drop.
A well-maintained system runs more efficiently, lasts longer, and is far less likely to fail at the worst possible moment. Preventive maintenance visits also give us a chance to flag components that are wearing down and give you time to plan rather than react. We'll get your home comfortable again fast.
Universal City is home base, and the surrounding communities are a regular part of our service area. We work throughout Bexar County, including Converse, Kirby, Schertz, Live Oak, Selma, Windcrest, and the northeast side of San Antonio. If you are in one of these communities and need HVAC service, we can get someone out to you. Locally owned and personally accountable, we are a real local operation where a real local person who knows the area picks up the phone when you call. Call today and we'll set up your appointment.
The quality of any HVAC job comes down to the people doing the work. Our technicians bring hands-on experience across a wide range of equipment types and job sizes, from older systems that need careful diagnosis to new high-efficiency installations that require precise setup. They work on heat pumps, central AC systems, furnaces, mini-splits, and ductwork, and they bring the same attention to detail to a maintenance visit as they do to a full system replacement. Experience across many types of HVAC work and property types means fewer surprises and better outcomes for the customer on every call.
We have been serving Universal City and the surrounding Bexar County area since 2016. Over that time we have built a reputation for showing up, diagnosing problems correctly, and standing behind the work we do.
We are a family-run heating and cooling business built on honest, hands-on work. That means straight answers about what a system needs, clear pricing before any job starts, and technicians who treat your property with care on every visit.
Yes. Our technicians bring hands-on experience across a wide range of equipment types, including heat pumps, central AC systems, furnaces, mini-splits, and ductwork. They are familiar with the homes and the climate in Bexar County, which means fewer surprises on the job.
We stand behind the work we do. If something we repaired or installed is not performing the way it should, call us and we will come back and make it right. Our reputation in this community matters to us, and we do not walk away from a job that needs follow-up.
If a problem we addressed returns, call (830) 590-9289 and we will get back out to look at it. We take those calls seriously because we know that word-of-mouth in a community like Universal City depends on doing right by every customer, not just on the first visit.
Yes. We regularly work throughout Bexar County, including Converse, Kirby, Schertz, Live Oak, Selma, Windcrest, Cibolo, and the northeast side of San Antonio. If you are in one of those communities and need HVAC service, call us and we will get someone out to you.
We treat every home and commercial space with respect, which includes cleaning up after ourselves before we leave. Technicians take care around flooring, walls, and equipment during the job and make sure the work area is tidy when the visit is done.
Manuel Serrano HVAC Mechanical has been a part of this community since 2016, and the work we do today reflects the same values we started with: show up on time, diagnose it correctly, price it honestly, and do it right. We serve homeowners and property managers across Universal City and Bexar County, and we are available for emergency calls around the clock. Trusted by homeowners. Relied on by property managers. Ready for your system. Call (830) 590-9289 to schedule service or request a quote, and let us show you what a local HVAC company with real experience looks like.
We handle the full range of residential and commercial heating and cooling work in Universal City and the surrounding Bexar County communities. Whether you need a quick repair, a seasonal tune-up, or a complete system replacement, the table below lays out what each service covers and who it is best suited for. If you have questions about your specific situation, call us and we will walk you through the options before any work begins.
| Service | What the Service Includes | When You Need It | Good to Know |
|---|---|---|---|
| Seasonal Maintenance and Tune-Ups | Full system inspection and cleaningRefrigerant and airflow checkThermostat calibrationSmall-problem identification before failure | Homeowners and property managers who want to extend equipment life and avoid emergency calls | Spring is the right window for AC service before the heat arrives; fall is the right time for heating service before temperatures drop. We also offer maintenance for commercial clients. |
| Full System Installation and Replacement | Equipment sizing for your home or buildingNew central AC or furnace installationFull system swap with matched componentsClear estimate before anything is ordered | Homeowners or property managers replacing an aging or failing HVAC system | Heavy cooling seasons in Bexar County accelerate wear; a properly sized replacement system can lower monthly energy costs noticeably compared to an aging unit running past its useful life. |
| Emergency HVAC Service | Same-day response when slots are availableAfter-hours and weekend callsNo-heat and no-cool emergency dispatchReal local person answers when you call | Any household or business where the system has gone down and waiting days for service is not an option | System failures do not keep business hours; we handle emergency calls and work to get a technician on the way as quickly as the schedule allows. |
| Heat Pump Installation | Site assessment and load calculationEquipment selection and sizingFull installation from start to finishZoning and comfort-control walkthrough | Homeowners looking to replace an aging central air system or add efficient heating and cooling from one unit | Heat pumps are a strong fit for the South Texas climate because mild winters mean the system rarely has to work at the limits of its heating capacity. |
| Indoor Air Quality and Air Filtration | Whole-home air filtration installationAir purifier and air scrubber setupHumidity and moisture assessmentIntegration with existing HVAC equipment | Households dealing with stale air, allergy symptoms, or persistent odors that do not clear on their own | Excess indoor humidity in this climate can affect air quality, not just comfort; addressing both filtration and humidity together often produces the biggest improvement. |
| Whole-Home Dehumidification and Humidity Control | Whole-home dehumidifier installationIntegration with existing HVAC equipmentHumidity level assessmentComfort and air quality improvement | Homes where high indoor humidity makes the air feel warmer than the thermostat shows or where moisture is straining the AC | Persistent humidity is common in Bexar County; a whole-home dehumidifier reduces the load on your AC and makes indoor spaces feel more comfortable at the same thermostat setting. |
| Furnace and AC System Replacement | Assessment of existing equipmentReplacement equipment recommendationFull installation by qualified techniciansEnergy-efficiency review as part of the process | Households where repairs have become frequent or efficiency has dropped sharply | Long run-times in South Texas heat add up fast; when repair costs approach the value of the equipment, replacement is often the smarter investment. |
| Thermostat and Smart-Control Installation | Wi-Fi and programmable thermostat installationReplacement of inaccurate or failed unitsSmart-control setup and app configurationMulti-zone control options | Homeowners who want better control over comfort and energy use, or whose current thermostat is not reading temperatures correctly | A thermostat upgrade is one of the lower-cost HVAC improvements with an immediate payoff, and it can be scheduled quickly without a major job window. |
| Ductwork Repair and Sealing | Duct leak location and diagnosisSealing of problem areasReplacement of deteriorated duct sectionsAirflow verification after repair | Homes with uneven temperatures room to room or higher-than-expected energy bills despite a functioning system | Leaky ducts are a common and underdiagnosed cause of comfort problems; a duct inspection often explains why a system that tests fine at the unit still cannot keep the house comfortable. |
| Heat Pump Repair and Service | Full system diagnosticRefrigerant and airflow checkReversing valve and controls inspectionRepair estimate before work begins | Homes with an existing heat pump that is not heating or cooling properly | Heat pumps handle both heating and cooling from a single unit, so a problem in one mode often points to a shared component worth catching early. |
| AC Repair and Service | Diagnostic and troubleshootingRefrigerant leak checkAirflow and controls inspectionSame-day repair when available | Homeowners or businesses with an AC that is not cooling, cycling oddly, or will not start | South Texas cooling seasons are long and hard on equipment; catching a small problem early usually costs less than waiting until the system fails mid-summer. |
| Heating and Furnace Repair | Furnace diagnostic and inspectionIgnition and heat exchanger checkBlower motor and controls serviceEmergency no-heat response | Households dealing with a furnace that blows cold air, short-cycles, or makes unusual sounds or smells | Winters in this area are mild but do arrive; a furnace that has sat idle all year should be checked before the first cold snap hits. |
How do I know if my AC or furnace needs to be replaced rather than repaired?
A few things point toward replacement: the equipment is more than 12 to 15 years old, repairs have been coming up more than once a season, or the cost of the next repair is approaching a significant fraction of what a new system would cost. We give honest repair-versus-replacement guidance based on the actual condition of the equipment, not on what produces the higher ticket. If you are unsure, call us and we will assess the system and walk you through the options.
Why would my system stop heating or cooling even though it appears to be running?
A system that runs but does not condition the air is usually dealing with one of a few issues: a refrigerant problem, a dirty or blocked coil, an airflow restriction from a clogged filter or leaky duct, or a controls failure. In some cases the outdoor unit is running but the indoor air handler is not moving air properly. A proper diagnostic at the unit is the only reliable way to find the cause. Call us and we will get a technician out to trace the problem from the start.
How often should I schedule a maintenance tune-up?
Once a year is the minimum, and twice a year is better if you want to catch problems in both the cooling and heating sides of the system. Spring is the right window for AC service before the long Texas cooling season begins, and fall is the right time to check the heating system before temperatures drop. Regular maintenance extends equipment life and is the most reliable way to avoid emergency calls.
Same-Day and Emergency Availability
We offer same-day scheduling when slots are open and take emergency calls for both no-heat and no-cool situations, including after hours and weekends. System failures do not keep business hours, and we work to get a technician on the way as quickly as possible.
What does a seasonal tune-up actually include?
A tune-up covers a full inspection of the system, cleaning of key components, a refrigerant check, airflow verification, and thermostat calibration. We look for anything that is starting to wear or underperform and flag it before it becomes a failure. We do not push repairs that are not yet necessary; if something can wait, we will tell you that clearly.
Is a heat pump a good choice for a home in this area?
Yes, for most homes in the Universal City area a heat pump is a practical and efficient option. Because winters here are mild, a heat pump handles the heating load without needing the heavy-duty output that colder climates demand. That makes it a solid replacement path for aging central air systems, giving you both heating and cooling from one unit. We assess your home and walk you through sizing and zoning options before recommending anything.
Why is one room in my home always hotter or colder than the rest?
Uneven temperatures are usually caused by duct leaks, an undersized or oversized system, blocked or closed vents, or poor airflow balance in the duct layout. In some cases a thermostat that is not reading accurately is part of the problem. A duct inspection and a look at the overall airflow often turns up the cause quickly. Call us and we will take a look at the system as a whole rather than just the unit.
Transparent Upfront Pricing
We give you a clear estimate before any work begins. Pricing is communicated in plain language, and we explain exactly what we found and what it will cost before we start. No surprise charges after the fact.
What can strange noises from my HVAC unit mean?
Different sounds point to different problems. A rattling or banging sound often means a loose or failing component inside the air handler or outdoor unit. A high-pitched squeal can indicate a blower motor or belt issue. A grinding noise is worth taking seriously and usually means something is wearing in a way that will get worse quickly. If your system is making a sound it did not make before, call us and describe what you are hearing. We can often narrow down the likely cause before the technician arrives.
How do indoor humidity levels affect my AC and my comfort?
High indoor humidity makes the air feel warmer than the thermostat shows, which causes the AC to run longer and work harder to reach the set temperature. Over time that adds wear to the equipment and raises energy costs. In Bexar County, ambient humidity is persistent, and a whole-home dehumidifier integrated with your existing HVAC equipment can make a real difference in both comfort and how hard the system has to work.
Family-Owned and Locally Operated
We are a family-run heating and cooling business serving Universal City and the surrounding Bexar County communities. Hire us and you're hiring a neighbor who knows your home.
Do I need to be home when the technician comes out?
Someone needs to be present to provide access to the equipment and to hear the diagnostic findings and estimate before any work begins. We give you a clear explanation of what we found and what it will cost before we start, so being available for that conversation matters. If scheduling is a challenge, call us and we will work with you to find a window that fits.
How does pricing work, and will I know the cost before anything starts?
Yes. We give you a clear estimate before any work begins, so there are no surprise charges after the fact. Pricing is explained in plain language, and we walk you through what we found and what the repair or installation will cost before we proceed. For larger jobs like a full system replacement, we explain up front if a deposit is required to cover equipment ordering.
What should I check before calling for emergency service?
Start with the thermostat: confirm it is set to the right mode and that the temperature setting is where you expect it. Then check whether the circuit breaker for the air handler or furnace has tripped. A clogged filter can also shut a system down by starving it of airflow. If none of those resolve it, call us. We handle same-day and after-hours emergency calls, and a technician will diagnose the problem properly rather than guessing.
Call (830) 590-9289 and we will talk through your system, answer your questions, and get you scheduled for service.
(830) 590-9289