Magnum Heating & A/C is the HVAC contractor Converse residents and businesses call when the system stops working or needs an upgrade. We handle repair, installation, replacement, and maintenance for every major system type, from central air and gas furnaces to heat pumps, mini-splits, and everything in between. Whether you own a single-family home, manage a rental portfolio, or run a commercial property in Bexar County, we cover the full range of heating-and-cooling work from one call. Call (830) 590-9782 for a quote.
We've handled everything from a quick tune-up to a full system swap, and the work looks the same on every job: show up, diagnose it correctly, and fix it right. From a fast AC repair to a complete HVAC system replacement, from a thermostat swap to a ductwork overhaul, we cover it all for homeowners, landlords, and property managers across the area. Work is performed by qualified HVAC technicians who know these systems and know this area. Local means we care what the neighbors think of our work. Your system is in good hands with us.
When the heat index climbs and your AC stops keeping up, the problem needs a real diagnosis, not a guess. We handle the full range of cooling-side work: a system that stopped cooling entirely, a unit running but blowing warm air, refrigerant leak diagnosis, condenser and compressor service, evaporator coil cleaning, and airflow troubleshooting for rooms that never seem to reach the right temperature.
If your AC stopped working this morning, same-day service is often available. We get to the root of the problem rather than patching around it, and code-compliant HVAC work on every job means the repair is done the way it should be, not the way that is fastest to invoice. Call and we'll handle the furnace, the AC, and the ductwork.
Converse winters are mild by northern standards, but a furnace that quits on a cold January night is still a problem. We diagnose and repair furnaces that are not working, systems running but not producing heat, and air handlers or blowers that are moving air without warming it. We also handle heat pump repair when the heating side fails, and we respond to emergency heating calls when the house is simply not heating.
Symptom keywords like "HVAC blowing cold air in winter" and "no heat in house" describe real situations we see regularly across Bexar County. We treat your home and its system the way we would our own, which means we look at the whole picture before recommending a repair or a replacement. We're one phone call from getting your comfort right.
When a system has reached the end of its useful life, repair costs stop making sense. We handle full HVAC system replacement and new installation for both residential and commercial customers, including central air installation, central air replacement, and complete system upgrades. Every installation is sized and configured to match the space it serves.
HVAC work sized and installed the way the manual calls for is not a slogan here. It is how we avoid the comfort problems that follow an undersized or oversized system. When you call for a quote, we go over HVAC installation cost and HVAC replacement cost in plain terms so you know what the job covers before anything is scheduled.
Affordable rates. Flexible timing. Reliable comfort.
Let us handle the install and the permits.
Not every space is set up for traditional ducted HVAC. Mini-split and ductless systems are a practical answer for room additions, converted garages, older buildings without existing ductwork, and commercial spaces that need independent temperature control. We handle mini-split installation, mini-split repair, ductless AC installation, and ductless AC repair across the Converse area. If you have a space that your central system cannot reach or cannot condition efficiently, a ductless setup is worth a conversation.
Leaking or poorly connected ductwork is one of the most common reasons a system runs constantly but never gets the house comfortable. We repair and seal ductwork, address leaking sections, and correct airflow problems that cause uneven temperatures from room to room. Fixing the duct system often makes a bigger difference than replacing equipment.
On the controls side, we install thermostats, replace thermostats that are not working, and set up smart thermostat systems that give you better visibility and control over your home's comfort. Zoning and comfort-control upgrades pair well with ductwork improvements when you want different areas of the home to behave independently. Your system is in good hands with us.
The air inside a home can carry dust, allergens, and airborne particles that a standard filter does not catch. We install whole-home air filtration systems and air purifiers that work with your existing HVAC equipment to improve what you are breathing every day. Indoor air quality service is worth considering alongside any major system repair or replacement, since the equipment is already being serviced and the upgrade is straightforward. Cleaner air and better comfort go together, and we can walk you through the options when you call.
A spring AC tune-up before the Converse heat arrives and a fall furnace check before temperatures drop are the two maintenance visits that prevent the most expensive repairs. A seasonal tune-up covers inspection, cleaning, performance testing, and catching small problems before they turn into system failures. Annual HVAC maintenance keeps equipment running at the efficiency it was designed for, which matters more as a system ages.
We check the furnace. We check the AC. We leave it running right.
Call to schedule a seasonal tune-up or annual HVAC inspection before the next season catches you off guard. We're one phone call from getting your comfort right.
When the system is completely down, no cool in August or no heat on a cold night, waiting is not an option. We take emergency HVAC calls every day from 9:00 AM to 9:00 PM and offer same-day service when the situation calls for it. Whether the issue is an AC that stopped working, a furnace not turning on, or a heat pump that has gone down entirely, we diagnose and address the problem the same day when same-day appointments are available.
If your HVAC unit is not turning on, the house is not heating, or the system quit without warning, call us. We will confirm what is available and get the job moving. Your system is in good hands with us.
Property managers trust us to keep their buildings comfortable, and that applies whether the property is a single-family rental, a multi-unit complex, or a commercial building in the greater San Antonio area. Commercial HVAC service, commercial HVAC repair, and commercial HVAC installation all follow the same standard we apply on every residential job: qualified technicians, correct sizing, and work done the way it should be.
Landlords and property managers appreciate that we can respond quickly and communicate clearly about what the system needs and what the repair will cost. Apartment HVAC repair and rental property HVAC service are a regular part of what we do across Bexar County. Call and we'll handle the furnace, the AC, and the ductwork.
South Texas runs hot for a long stretch of the year, and Converse is no exception. The cooling season is long and intense, humidity adds load on top of temperature, and the heating season, while shorter, still demands a system that performs when temperatures drop. The three services below come up regularly here because the climate makes them genuinely relevant to Bexar County homes and properties.
Equipment that was installed years ago was not designed for the efficiency standards available today, and a system working overtime through extreme South Texas summers ages faster than one in a milder climate. When repair costs start stacking up or the system can no longer hold the temperature you set, full HVAC replacement is usually the more practical path. Call for an HVAC replacement quote and we will walk through the options, the costs, and what a new system sized for your space will actually do for your comfort and your energy use.
Mild Converse winters make heat pumps an efficient fit for this area. A heat pump handles both cooling and heating from a single system, which simplifies the equipment setup and reduces the fuel demands that come with a furnace-only configuration. Heat pump installation, heat pump replacement, and heat pump service are all work we handle regularly in this part of Texas. If you are replacing an older system or adding comfort to a new space, a heat pump is worth including in the conversation.
High ambient humidity is a real factor in Converse and across Bexar County. When the air inside a home holds too much moisture, it affects how comfortable the space feels even when the thermostat is set correctly, and it puts extra load on the cooling system. A whole-home dehumidifier works alongside your existing HVAC equipment to manage indoor humidity as part of a broader indoor comfort strategy. We install and service whole-home dehumidification systems and can pair that work with air filtration upgrades when indoor air quality is a concern.
We provide HVAC service throughout Converse and the surrounding communities in Bexar County and the greater San Antonio metro, including:
If you are nearby and need heating or cooling service, call (830) 590-9782 for a quote.
A true HVAC emergency is any situation where the home or building is not heating or cooling and the conditions are unsafe or unlivable. In Converse, that includes an AC that stops working during peak summer heat and a furnace or heat pump that fails during a cold snap. We take emergency calls every day from 9:00 AM to 9:00 PM and offer same-day service when the situation calls for it.
An AC that runs without cooling usually points to one of a handful of causes: low refrigerant from a leak, a dirty or blocked evaporator coil, a failing compressor, or an airflow problem in the duct system. Any of these can cause the system to run continuously without reaching the set temperature. A full diagnostic identifies which issue is at work so the repair addresses the actual cause rather than a symptom.
A heat pump moves heat rather than generating it. In cooling mode it pulls heat out of the indoor air and exhausts it outside, the same way a central air conditioner works. In heating mode it reverses the process, extracting heat from the outdoor air and moving it inside. In a climate like Converse where winters are mild, the heating side rarely gets pushed to its limits, which makes a heat pump an efficient fit for both seasons.
Repair makes sense when the equipment is relatively new and the cost is reasonable relative to what the system is worth. When a system is running old, losing efficiency, breaking down repeatedly, or facing a repair that costs more than the system's remaining value, replacement is usually the better path. We walk through both options when we diagnose the job so you can make an informed decision before any work is authorized.
The technician starts with a full diagnostic: checking refrigerant levels, testing controls, inspecting the heat exchanger or coil, measuring airflow, and looking at the components most likely to cause the reported symptoms. From there, the scope of the repair or service is based on what was actually found, not a standard package. You are told what the diagnosis revealed and what the recommended work involves before anything is done.
A tune-up covers the full system. On the cooling side that means checking refrigerant levels, cleaning the evaporator and condenser coils, testing the blower and airflow, and inspecting electrical controls. On the heating side it means testing ignition, inspecting the heat exchanger, checking the burner or heat pump controls, and calibrating the thermostat. Anything that looks like it is heading toward a problem gets flagged before it becomes a breakdown.
For most service calls, yes. The technician needs access to the equipment, which is usually inside the home or in a utility area that requires someone to let them in. For exterior-only work on the condenser unit, access requirements may differ. When you book the appointment, let us know the access situation and we will confirm what is needed.
Banging or clanking usually points to something loose or broken inside the air handler or compressor. Squealing often comes from a worn blower belt or a motor bearing that is failing. Rattling can mean a loose panel, a debris problem in the outdoor unit, or a component that has come loose inside the cabinet. Any of these sounds is worth a service call, because the underlying cause tends to get worse if the system keeps running.
A burning smell when the heat first turns on in fall is often dust burning off the heat exchanger and usually clears quickly. A persistent burning smell points to something more serious, such as an overheating motor or an electrical component under stress, and the system should be shut off and inspected. A musty smell typically means moisture is present somewhere in the system, often in the coil or the ductwork, and can indicate a drainage or humidity issue that needs to be addressed.
Leaky ducts let conditioned air escape before it reaches the rooms it is supposed to serve, which means the system runs longer and works harder without actually improving comfort. Undersized ducts restrict airflow and create pressure imbalances that cause uneven temperatures from room to room. Sealing and correcting the duct system often makes a more noticeable difference in comfort than replacing the equipment itself.
Where permits are required for the work being performed, we handle that process as part of the job. Code-compliant HVAC work on every job means the installation meets the applicable requirements for Bexar County and the city of Converse. You do not need to manage the permitting process separately.
Extreme heat or a rain event can affect the timing of outdoor work, particularly for condenser installation or refrigerant service that requires the system to be running. Technicians assess conditions on arrival and adjust the sequence of work accordingly. If weather causes a significant delay or requires rescheduling, we communicate that before it becomes a problem.
Magnum Heating & A/C handles the full range of heating and cooling work for homes and businesses in Converse and across Bexar County. From emergency AC repair and furnace service to full system replacement, heat pump installation, ductwork sealing, and indoor air quality upgrades, we cover what your system needs. Pricing is straightforward: you get the rate on the phone, explained clearly before anything is scheduled. We are available every day from 9:00 AM to 9:00 PM to take your call.
Call (830) 590-9782 for an HVAC quote near you.
We protect your home. We service your system. We earn the call.
From a fast AC repair to a full system replacement, we handle the complete range of heating and cooling work for homes and businesses in Converse and across Bexar County. The table below covers what each service includes, who it fits best, and a practical note to help you decide where to start. Call (830) 590-9782 for a quote on any of these services.
| Service Type | Scope of Work | Common Needs | Helpful Details |
|---|---|---|---|
| Furnace & AC System Replacement |
| Homeowners whose repair costs are stacking up or whose system can no longer hold the set temperature | South Texas summers accelerate wear on older equipment, making timely replacement a practical choice |
| Heating & Furnace Repair |
| Any home or building that loses heat during a cold snap | Even mild Converse winters can make a furnace failure urgent on the coldest nights |
| Seasonal Maintenance & Tune-Ups |
| Any homeowner who wants to prevent breakdowns before the next season arrives | A spring AC tune-up and a fall furnace check are the two visits that prevent the most expensive repairs |
| Indoor Air Quality & Air Filtration |
| Households concerned about dust, allergens, or airborne particles indoors | An air quality upgrade is straightforward to add when the system is already being serviced |
| Ductwork Repair & Sealing |
| Homes where the system runs constantly but comfort is uneven from room to room | Sealing the duct system often makes a bigger difference in comfort than replacing equipment |
| Heat Pump Repair & Service |
| Homes running a heat pump for both heating and cooling | Heat pumps are a common fit in South Texas and benefit from annual inspection of both modes |
| Whole-Home Dehumidification & Humidity Control |
| Bexar County homes where high ambient humidity makes the indoor air feel uncomfortable even at the right temperature | Managing indoor humidity reduces extra load on the cooling system and improves overall comfort |
| Emergency HVAC Service |
| Any home or building where the HVAC system has stopped working and waiting is not an option | We take emergency calls every day from 9:00 AM to 9:00 PM and offer same-day service when available |
| AC Repair & Service |
| Homeowners and property managers whose AC stopped cooling or is underperforming | Same-day service is often available when the system goes down during peak summer heat |
| Thermostat & Smart-Control Installation |
| Anyone who wants better visibility and control over indoor temperature | A thermostat upgrade pairs well with ductwork improvements for room-by-room comfort control |
| Full System Installation & ReplacementMost Popular |
| Homeowners and commercial property owners replacing aging or failing equipment | We go over installation and replacement costs in plain terms before anything is scheduled |
| Heat Pump Installation |
| Homeowners replacing an older system or adding comfort to a new space in a mild-winter climate | Converse winters are mild enough that a heat pump handles both seasons efficiently from a single system |
What are the signs that my AC or furnace needs to be replaced rather than repaired?
A few patterns point toward replacement. If the system is breaking down repeatedly in the same season, if a single repair is going to cost more than the system is realistically worth, or if the equipment is running old and losing the ability to hold the temperature you set, replacement usually makes more financial sense than continuing to repair. We walk through both options when we diagnose the job so you have the information you need before any work is authorized.
How do I know if my system has a refrigerant or airflow problem?
A refrigerant problem usually shows up as an AC that runs continuously but never gets the house cool, or ice forming on the evaporator coil. An airflow problem tends to produce uneven temperatures from room to room, weak airflow at certain vents, or a system that short-cycles because it cannot move enough air across the coil. Both require a proper diagnostic to identify which issue is at work, since the symptoms can overlap and the repairs are different.
What causes a system to short-cycle, and is it a serious problem?
Short-cycling means the system turns on, runs briefly, shuts off, and repeats the cycle without completing a full cooling or heating run. It is usually caused by an oversized system, a refrigerant issue, a dirty filter restricting airflow, or a control problem. It is worth addressing promptly because short-cycling puts extra wear on the compressor and other components, and a system that cannot complete a full cycle will not dehumidify or condition the air effectively.
Diagnosis Explained Before Any Repair
We tell you what the diagnostic found and what the recommended work involves before anything is done. You get a clear picture of the problem and the cost before you decide.
How does a dirty filter or coil affect system performance?
A clogged filter restricts airflow across the evaporator coil, which reduces the system's ability to transfer heat and can cause the coil to ice over. A dirty coil has the same effect from the other direction: the buildup insulates the coil surface and prevents proper heat exchange. Both problems force the system to work harder for less output, raise energy use, and accelerate wear on the compressor and blower. Checking and changing the filter regularly is the simplest maintenance step a homeowner can take between service visits.
What is involved in a thermostat or smart-control upgrade?
A thermostat replacement starts with confirming the wiring at the existing unit is compatible with the new control. Most modern smart thermostats work with standard low-voltage HVAC wiring, but some older systems or heat pumps require specific wiring configurations. Once the right unit is selected, the installation covers removing the old thermostat, connecting the new one, programming the schedule and settings, and verifying that the heating and cooling modes respond correctly. We can also set up zoning controls when you want different areas of the home to behave independently.
Why is one room in my home hotter or colder than the rest?
Uneven temperatures from room to room usually trace back to one of a few causes: leaking or undersized ductwork that is not delivering enough conditioned air to that zone, a duct that has come disconnected, a blocked or closed register, or a room that is poorly insulated and gaining or losing heat faster than the system can compensate. In some cases the issue is a system that was not sized correctly for the square footage it serves. A diagnostic visit looks at airflow, duct condition, and system output to identify which factor is driving the problem.
Code-Compliant Work on Every Job
Every installation and repair is performed to meet the applicable requirements for Converse and Bexar County. Where permits are required, we handle that process as part of the job.
How do I choose between a furnace and a heat pump for my home?
In a climate like Converse, where winters are mild, a heat pump is often the more efficient choice because it moves heat rather than generating it, which uses less energy when outdoor temperatures stay above freezing. A gas furnace produces more heat output in very cold conditions, but those conditions are rare here. If you are replacing an existing system, the fuel source already in place, the layout of the home, and the age of the ductwork all factor into which direction makes more sense. We go through those specifics when you call for a quote.
What are the signs of a failing compressor or blower motor?
A failing compressor often shows up as an AC that runs but produces little or no cooling, hard starts where the system struggles to turn on, or a tripped breaker that keeps returning. A blower motor problem usually appears as weak or no airflow from the vents even when the system is running, unusual noise from the air handler, or a system that heats or cools at the equipment but cannot distribute the conditioned air through the home. Either issue warrants a diagnostic call before the component fails completely.
Experienced With Older and Newer Systems
We work on the full range of residential and commercial equipment, from aging systems that need careful diagnosis to newer units with smart controls and variable-speed components.
How does indoor humidity affect comfort and the HVAC system?
High indoor humidity makes a space feel warmer than the thermostat reading suggests, which leads most people to lower the set point and run the system longer. That extra run time adds wear and raises energy use without actually solving the comfort problem. Excess moisture in the air also puts more load on the evaporator coil and can contribute to mold growth in the ductwork or air handler over time. A whole-home dehumidifier manages humidity as part of the overall comfort system rather than relying on the AC alone to handle it.
Is older equipment worth repairing, or is it better to replace it?
The answer depends on how old the system is, what the repair costs, and how the equipment has been maintained. A system that is relatively young and has a single failed component is usually worth repairing. A system that is running old, has had multiple repairs in recent seasons, and is facing a significant repair cost is often better replaced, particularly in a climate like Converse where the cooling season is long and puts real hours on the equipment each year. We lay out both options clearly so you can make the call based on what actually makes sense for your situation.
When should I call a technician rather than attempting a DIY fix?
Anything involving refrigerant, electrical components inside the air handler or condenser, or the heat exchanger on a furnace should go to a qualified technician. Refrigerant handling requires proper equipment and training, and working on live electrical components or a cracked heat exchanger carries real safety risk. Filter changes, clearing debris from around the outdoor unit, and resetting a tripped breaker are reasonable homeowner steps. If those do not resolve the problem, or if the system is making unusual noises, producing strange smells, or failing to heat or cool, a service call is the right next move.
Call (830) 590-9782 to talk through your system, get a straight answer on what it needs, and schedule service at a time that works for you.
(830) 590-9782