Air Conditioning and Heating Repair in Mission, TX and Nearby Areas

Living in the Rio Grande Valley means your HVAC system never really gets a break. Long summers. Heavy humidity. Sudden temperature swings. All of it adds up. When something goes wrong, you feel it swiftly.

At Frontier Cooling & Heating, we provide dependable hvac repair for homeowners and businesses throughout Mission, TX. We’ve worked on systems that quit in the middle of the afternoon heat, units that start making noises out of nowhere, and setups that just can’t keep up anymore. That’s usually where people run into problems.



When an HVAC system starts acting up, waiting rarely helps. Small issues turn into bigger ones. Costs rise. Comfort drops. Our primary goal is to accurately identify the issue and resolve it effectively, allowing you to return to normal without any additional stress.

HVAC Repair from Frontier Cooling & Heating

HVAC systems aren’t simple machines. And no two breakdowns are exactly alike. That’s why we don’t rush repairs or guess at solutions.


As an experienced hvac contractor, we work on all major makes and models of residential and commercial equipment. From routine service calls to full hvac system repair, our technicians arrive ready to diagnose the issue, explain what’s going on, and talk through next steps before work begins.


We don’t believe in vague answers or pressure tactics. Just clear communication and solid repair work. That’s it.

Air Conditioning Repair for South Texas Conditions

In South Texas, air conditioning isn’t optional. When a system struggles, indoor temperatures climb quickly, and comfort disappears.

We handle air conditioning repair for systems that aren’t keeping up, are cycling constantly, or are shutting down altogether. If your AC is not cooling, it’s usually tied to refrigerant issues, airflow problems, electrical faults, or compressor trouble. This is where experience matters.



Our team regularly performs central AC repair, ac compressor repair, and ac leak repair. We track down the cause, not just the symptom. When repairs can’t wait, we also provide an emergency AC repair to get cooling restored as quickly as possible.

Heating and Furnace Repair Services

We don't use heating systems frequently here, but they still need to function properly when temperatures drop. If your system doesn’t turn on, heats unevenly, or keeps cycling, it’s time for service.



We provide reliable heating repair, including furnace repair and heat pump repair, along with airflow and control issues that affect performance. Proper repairs help prevent unnecessary wear and keep systems running safely when they’re needed

Commercial HVAC Repair and Service

Comfort matters at work too. HVAC issues in a commercial space affect employees, customers, and daily operations.



We offer professional commercial HVAC repair for offices, retail locations, and light commercial properties. Our commercial hvac service includes commercial AC repair, commercial heating repair, and repairs on rooftop and packaged systems. Downtime creates problems. We strive for efficiency without compromising on quality.

Ductwork and Air Duct Repair

Sometimes the HVAC unit isn’t the real problem. Air has to move properly for any system to work.



Leaks, damaged connections, or restricted airflow can cause uneven temperatures and higher energy use. We provide air duct repair and ductwork repair to correct airflow issues and help systems perform the way they should. This is often where comfort problems actually start.

Mini Split and Ductless AC Repair

Ductless systems are popular for zoning and efficiency, but they still need proper service when issues come up.



We provide dependable mini-split repair and ductless AC repair for both single-zone and multi-zone systems. Sensor issues, refrigerant leaks, drainage problems, and communication errors are common. We’ve seen them all and know how to address them correctly

Thermostat and Dehumidifier Repair

Not every problem comes from the main unit. Sometimes it’s the controls.



We handle thermostat repair when temperature readings are off or systems don’t respond properly. We also provide dehumidifier repair, which matters more than people realize in the Rio Grande Valley. Humidity control helps improve comfort and reduces strain on air conditioning systems.

Our Guiding Principles

At Frontier Cooling & Heating, how we work matters just as much as what we fix. These principles guide every repair we perform.


Service Comes First
We listen. We show up prepared. We focus on solving the problem efficiently. Every call gets the same level of attention, whether it’s a quick ac repair or a more involved system issue.


Integrity in Every Recommendation
Repairs should be based on facts, not pressure. We explain what we find and recommend solutions that make sense for your situation. Sometimes repair is the right move. Sometimes it isn’t. We’re upfront either way.


Respect for Your Home and Time
We arrive when we say we will, keep work areas clean, and communicate clearly throughout the process. Simple things. They matter.



Credibility You Can Trust
As a certified HVAC contractor, we stay current with modern equipment and repair standards. Consistency and reliability, not shortcuts, form the foundation of our reputation.

The Benefits of Professional HVAC Repair

Improved System Reliability

Correct HVAC repairs prevent systems from working against themselves. Parts fall back into sync. Cooling stays steady. That matters during long stretches of heat, when breakdowns are more common. This is usually where people run into problems—small issues ignored until the system finally quits. Professional HVAC repair helps stop that chain reaction early.


Better Energy Efficiency

An HVAC system that’s out of balance doesn’t fail quietly. It runs longer. Harder. Airflow problems, worn components, or refrigerant issues push it past where it should be. Proper hvac system repair brings things back into line so heating and cooling happen without wasted energy.


Longer Equipment Lifespan

Most systems don’t suddenly fail. They deteriorate gradually, component by component. Delays in repairs primarily affect compressors, motors, and controls. Addressing problems early reduces that strain and helps both central and ductless systems last longer than expected.


Improved Comfort and Airflow

Uneven rooms. Sticky air. The temperature never feels quite right. Those are usually signs something deeper is off. Once underlying issues are corrected, airflow improves and comfort becomes more consistent. You notice it fast—especially during peak summer months in Mission, TX.



Confidence in Your System

There’s a difference between hoping your system holds up and knowing where it stands. When repairs are done properly, that uncertainty goes away. That peace of mind is something customers trust Frontier Cooling & Heating for—right along with dependable comfort.

Serving Mission, TX and Surrounding Areas

We proudly serve Mission, TX, along with McAllen, Brownsville, Harlingen, Edinburg, Pharr, Weslaco, San Juan, Donna, and Mercedes. We understand the local climate and the HVAC challenges that come with it.

HVAC Repair FAQs

  • How do I know when my HVAC system needs repair?

    Reduced airflow, unusual noises, uneven temperatures, rising energy bills, or a system that won’t start are common signs.

  • Do you offer emergency AC repair?

    Yes. We provide emergency AC repair for urgent cooling failures, especially during extreme heat.

  • Can you repair older HVAC systems?

    Yes. We service both older and newer equipment and will let you know when repair still makes sense.

  • Do you handle commercial HVAC repairs?

    We provide full commercial HVAC repair and service for offices and light commercial spaces.

  • What causes an AC to stop cooling properly?

    Common causes include refrigerant leaks, compressor problems, airflow restrictions, thermostat issues, or electrical faults.