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Best heating and air conditioning pros near Round Rock, TX

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TRUSTED BY ROUND ROCK, TX HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon1.2k+
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Round Rock - Updated Nov 2026

Avatar for O 2 KOOL REFRIGERATION & A/C
O 2 KOOL REFRIGERATION & A/C
4.7(
584
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallDuctless Mini-split A/C - Install or Replace+47 more

Serving Round Rock, TX and surrounding areas

Approved

In business since 2015

Emergency services offered

Warranties offered

"I can not say enough positive about Chris and Chuck and O 2 KOOL!! Chuck came out in early January to look at my old Trane gas furnace .. he got it going with no trouble. Now today ... during our ice/snow armageddon it went out again. I called and Chris FaceTimed with me .. looked at what was up and talked me through how to relight the system myself. Good news .. I now have heat! I strongly recommend them to anyone who needs help with their heating and cooling system! They not only helped, but assured me .. a 60 yr old woman .. everything would be OK and safe. That is a VERY rare quality!"
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+25

23 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for COOL CREW ATX
COOL CREW ATX
4.5(
97
)
Central A/C - Service or RepairHeat Pump - Repair or ServiceGas Furnace / Forced Air Heating System - Repair+4 more

Serving Round Rock, TX and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

Welcome to Cool Crew ATX! Your Trusted HVAC Experts! We provide top-quality heating, cooling, and refrigeration services for homes and businesses. With 30+ years of expertise, Chief Technician Yamel Gonzales and our certified team deliver reliable installations, repairs, and maintenance to keep you comfortable year-round.\n\nWhy Choose Us?\n- Comprehensive HVAC & refrigeration solutions\n- Customer-first approach with integrity & professionalism\n- Energy-efficient systems to cut costs & improve comfort\n- Excellent ratings with 500+ hires in recent years\n\nServices We Offer: Furnace repair/installation, AC tune-ups & replacements, commercial refrigeration, and preventive maintenance.\n\nWhether you need emergency repairs or a custom system, Cool Crew ATX ensures every job is done right. Call 737-637-3900 today to schedule your service and stay comfortable all year long!

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20 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for PETROCELLI SERVICES, INC
PETROCELLI SERVICES, INC
4.5(
254
)
Central A/C - Install

Serving Round Rock, TX and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"It was scorching hot outside and our AC went out. We immediately called Petrocelli Services and they sent out a professional Technician to diagnose. It turned out we needed a new AC unit after 16 years. The staff was considerate of cost, time and made it extremely easy for me to understand the next steps. The open line of communication was amazing and kept me involved and provided me with detailed order form. Staff also played a huge roll in educating us on maintenance when caring for our new product. I will definitely call them again and refer them to my friends and family!"
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New Construction
Full System Install

+1

3 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for INDOOR COMFORT EXPERTS A-C
INDOOR COMFORT EXPERTS A-C
5.0(
19
)
Central A/C - Service or Repair

Serving Round Rock, TX and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"I have always used indoor comfort experts for all of my air conditioning needs. The staff is extremely knowledgeable and friendly to work with. Seth has many years in the trade and it shows through his work. I highly recommend this company!!"
Round rock
Round rock
Round rock
Austin Tx
Austin Tx

+6

16 neighbors recently requested a quote
Avatar for A-Plus Air Conditioning & Home Solutions
A-Plus Air Conditioning & Home Solutions
4.6(
991
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+12 more

Serving Round Rock, TX and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"I find them to be very honest. They don't try to make you upgrade. They sell you a little contract each year. They do a clean out of your equipment and a checkout of your equipment in the spring and then again prior to the winter. I have just found them to be real down to Earth. They have told me that my unit is better built than anything that I could buy today. They said as long as I could get parts for this one they suggest that, even though it is not as energy efficient as some of the new ones, it is older, but it is built better and it will last longer. It is very hard to find anyone in that business to tell you that because they are in business to sell new systems."
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+68

Response time1 day
Response rate100%
14 neighbors recently requested a quote
Avatar for TM Air Conditioning and Heating Services
TM Air Conditioning and Heating Services
5.0(
7
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+10 more

Serving Round Rock, TX and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"Thomas was excellent about responding to our request for an HVAC system bid, and when chosen, they were able to schedule our installation within a couple of days. They asked our needs and made recommendations for the right equipment for our home. The crew was efficient, polite, and neat. I could not ask for more!"
A/C installation
A/C installation
A/C installation
A/C installation
A/C installation

+7

Response time2 days
Response rate100%
9 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

No, it isn’t necessarily bad to turn your AC on and off frequently—contrary to popular belief. Even if you stop and start your AC throughout the day, it won’t use as much energy as it would if you ran it nonstop. 

If you’re concerned about your power consumption and energy costs, there are a few simple ways to use your AC more efficiently. Regularly cleaning the filters, scheduling routine maintenance, and using a programmable thermostat are all great choices.

If you have central air conditioning, it’s fine to run your AC all day if that’s what you want—as long as the AC unit is in good condition. But if your AC runs constantly when you don’t want it to, there may be a problem with your system (like the ones we’ve mentioned above). Window AC units and wall air conditioners aren’t as powerful as central AC, so you should only run those kinds of air conditioners for eight to 12 hours at a time.

Absolutely! You can seriously improve the overall value of your home by maintaining high-quality, compatible systems for heating and cooling. Potential buyers will love not having to worry about getting a new HVAC unit for 15 to 20 years and will pay more for it. For maximum efficiency and cost savings, replacing the furnace and air conditioner at the same time, when possible, gives you (and potential future buyers) reliable comfort and modern convenience.

The decision to put your AC unit on the roof or ground depends on the climate in your area, the roof shape, accessibility, and budget. If you live in a warm climate or don’t have existing ductwork, it’s likely best to stick to a traditional AC unit that sits on the ground. However, if you lack yard space, live in a mild climate, and have easy access to the roof, your home may benefit from a rooftop AC unit. 

No, you should not run an air conditioner with a Freon leak. If you think your AC unit is leaking refrigerant, shut it off immediately. When you keep using a leaky air conditioner, it could damage the unit and release more refrigerant. After turning off the AC, have an HVAC pro come take a look at the unit.

The Round Rock, TX homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.