Rooftop AC units are powerful, space-saving systems often used in commercial buildings—but when something goes wrong, it can impact comfort, productivity, and even your bottom line. At Superior AC & Heat, we specialize in servicing and repairing rooftop HVAC systems across Burleson, Arlington, Mansfield, and nearby Texas communities. Our approach is fast, accurate, and focused on long-term solutions—not just patchwork fixes.
Whether your business is dealing with inconsistent cooling, strange noises, or total system failure, we’re here to help identify the problem and get it repaired without unnecessary downtime.
What Are Rooftop AC Units?
Rooftop AC units, also known as RTUs (Rooftop Units), are self-contained heating and cooling systems designed for commercial buildings. Unlike split systems used in homes, RTUs contain all components—compressor, condenser, evaporator, and air handler—within one cabinet mounted on the roof. They connect to the building’s ductwork to circulate air throughout.
Because they’re located on the roof, RTUs are ideal for saving interior space and reducing noise inside the building. But their rooftop location also means they’re exposed to extreme weather, debris, and wear—making routine maintenance and prompt repairs essential.
Common Problems with Rooftop AC Units
Like any mechanical system, RTUs can experience a range of issues. Some are quick to fix; others require expert attention. Here are some of the most frequent problems we encounter:
1. Low Refrigerant Levels
If your rooftop unit is blowing warm air or can’t keep up with cooling demands, it might be low on refrigerant. This could be caused by a leak, which needs to be located and repaired before recharging the system.
2. Electrical Failures
Rooftop units rely on a series of electrical components—contactors, capacitors, and relays—to function. Exposure to heat and moisture can cause these parts to degrade. Symptoms may include the unit failing to start or short cycling.
3. Fan Motor Issues
Both condenser and blower fans must operate correctly for your RTU to cool effectively. If the fan motor wears out or accumulates debris, airflow is reduced and the system may overheat.
4. Dirty Coils and Filters
Outdoor coils can collect dirt, leaves, and grime, which reduces the system’s efficiency and leads to overheating. Dirty filters restrict airflow and increase strain on the unit, often resulting in reduced cooling or freezing coils.
5. Thermostat or Control Malfunctions
If the control board or thermostat isn’t working properly, it can send incorrect signals to the unit—or no signal at all. This could cause the unit to turn off prematurely or not run at all.
6. Drainage and Moisture Problems
Blocked condensate drain lines can cause water to back up and damage components. On a rooftop, pooling water around the unit can even damage your building’s roof if not addressed quickly.
How We Diagnose and Repair Rooftop Units
At Superior AC & Heat, our approach to rooftop unit repair starts with thorough diagnostics. Our experienced technicians inspect every critical component to determine the source of the problem before recommending a solution.
Here’s what our repair process looks like:
- System performance check: We assess whether the unit is cooling evenly, running efficiently, and cycling properly.
- Refrigerant pressure test: We check for proper levels and inspect for leaks using safe, approved methods.
- Electrical system inspection: We test all connections, capacitors, relays, and control boards for damage or wear.
- Airflow and filter check: We verify that nothing is blocking or reducing airflow, including filters, fans, and coils.
- Component testing: We evaluate the performance of motors, belts, compressors, and other moving parts for signs of failure.
- Thermostat and controls review: We ensure the unit is receiving the right commands and cycling on/off correctly.
- Clean and clear: We clean coils, check drain lines, and remove debris from the cabinet to keep the unit running smoothly.
Once we diagnose the problem, we walk you through your repair options clearly and honestly—without pushing replacements unless they’re absolutely necessary.
Preventing Future Rooftop AC Issues
The best way to avoid rooftop AC failure is to stay on top of regular maintenance. Commercial systems work harder than residential ones and require at least twice-a-year inspections to stay in peak condition.
Our commercial HVAC maintenance includes:
- Seasonal tune-ups
- Coil cleaning and filter replacement
- Refrigerant pressure checks
- Belt and motor inspections
- Full system performance review
Preventive care not only reduces emergency repairs but extends the life of your rooftop system and lowers energy costs over time.
Count On Us for Commercial Rooftop AC Repairs
When your rooftop AC unit stops working, it affects more than just temperature—it impacts your team, your customers, and your ability to do business. At Superior AC & Heat, we understand how important reliable cooling is for your operations. That’s why we offer fast response times, clear communication, and lasting repairs that keep your system running strong.
Need service for a rooftop AC unit in Burleson, Arlington, Mansfield, or nearby? Call Superior AC & Heat today for expert help from a local team that knows commercial HVAC inside and out.
