We are a family-owned company with more than 25 years of HVAC experience in our family, serving the Austin area as well as San Antonio. Call our Austin-area line at (737) 222-0414 or request service online.
HVAC in Round Rock: The Short Answer
Modern Air Systems provides AC repair, HVAC system replacement, heating repair and maintenance in Round Rock, TX, for homeowners, landlords and small businesses. Our Austin-area team serves Round Rock and nearby Williamson County communities, with honest repair-first advice and written pricing before work starts. Call (737) 222-0414.
HVAC Services in Round Rock
- AC repair for systems that are not cooling, short cycling or leaking
- Full HVAC system replacement for split systems, heat pumps and packaged units
- Furnace and heat pump repair
- Spring and fall tune-ups and the Comfort Club maintenance plan
- Ductwork repair and replacement
- Thermostat installation
- Light commercial HVAC for small businesses
- Second opinions on HVAC quotes
Most-requested services in Round Rock: AC repair, HVAC system replacement, maintenance and the Comfort Club, heating and furnace repair and light commercial HVAC.
Common HVAC Problems in Round Rock Homes
Which service fixes each problem
The five issues we see most in Round Rock homes
| Problem | Where to start |
|---|---|
| An upstairs that never cools down | Ductwork repair, then system sizing |
| Original builder-grade systems wearing out | System replacement |
| Attic ductwork losing cool air through leaks and loose connections | Ductwork repair |
| Clogged condensate drains causing water leaks | AC repair or Maintenance |
| AC running constantly on summer afternoons | AC repair |
Repair or Replace?
If your system is 12 to 15 years old or needs a major repair, it may be time to compare repair and replacement. We give you an honest opinion. Send us a photo of your nameplate for a same-day price estimate on a new system, confirmed after an in-home or photo-based assessment. Financing is available for qualified homeowners.
Why Round Rock Homeowners Choose Modern Air Systems
- Licensed and insured, Texas license TACLB27872E
- Family-owned, with three generations of HVAC experience
- Written, upfront pricing before work starts
- A 1-year labor warranty on system replacements
Round Rock Areas We Serve
We serve homes and businesses across the city, plus nearby Austin-area communities including Cedar Park, Pflugerville and Georgetown.
AC Repair in Round Rock
Summers here are long and hot, and most of our calls are for systems that stopped cooling. We test capacitors, contactors, refrigerant pressures, airflow and drains before we recommend a repair. See how our AC repair service works.
HVAC System Replacement in Round Rock
Many local neighborhoods were built during the same growth periods, so their original systems are aging at the same time. If yours needs a major repair, we give you an honest comparison of repair and replacement and a same-day price estimate from a photo of your nameplate. See HVAC system replacement.
Upstairs Too Hot? Two-Story Comfort in Round Rock
Two-story homes in Round Rock often have an upstairs that never cools down. The cause can be undersized ducts, leaky connections in the attic, a system that is too small for the second floor, or a thermostat in the wrong place. We check airflow room by room and recommend fixes such as ductwork repair, zoning or a dedicated upstairs system only when needed.
Heating and Maintenance in Round Rock
We repair gas furnaces and heat pumps before cold fronts arrive, and we offer spring and fall tune-ups through the Comfort Club maintenance plan.
Licensed HVAC Service in Round Rock
You can verify our Texas license, TACLB27872E, with the Texas Department of Licensing and Regulation before scheduling service.
What to Check Before You Call for AC Repair in Round Rock
A few quick checks can save you a service call:
- Make sure the thermostat is set to Cool and the set temperature is below the room temperature
- Check the breaker for the outdoor unit and the indoor air handler or furnace
- Replace a dirty air filter
- Look for ice on the refrigerant lines; if you see ice, turn the system off and let it thaw before calling
- Check that the outdoor unit is running and its fan is spinning
If these checks do not solve the problem, call our Austin-area team. We will diagnose the system, explain what we find and give you a written price before any repair.
Frequently Asked Questions
Do you serve Round Rock, TX?
Yes. We provide AC repair, HVAC system replacement, heating repair and maintenance in Round Rock and nearby Williamson County communities.
How do I reach your Austin-area team?
Call (737) 222-0414 or request service online, and we will schedule the next available time.
Can you give me a price for a new system from a photo?
Yes. Send a clear photo of your equipment’s nameplate, and we can send a same-day price estimate, confirmed after a short assessment.
Do you work on homes with two or more systems?
Yes. Many two-story homes have separate upstairs and downstairs systems, and we service and replace both.
Do you have a technician near Round Rock?
Yes. Our Austin-area team serves Round Rock. Call (737) 222-0414 to schedule.
Can you fix an upstairs that is always hot?
Often, yes. We check ductwork, airflow and system size and recommend the fix that solves the problem, from duct repairs to an upstairs system.
Do you work on rental homes in Round Rock?
Yes. We work with local landlords and property managers on tenant repairs, maintenance and replacements.