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5 Years
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Emergency
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Your Trusted HVAC & Plumbing Experts in Round Rock, TX
Cool Kids AC & Heat is a family-owned and operated business serving the Round Rock community with over 20 years of expertise in the HVAC industry. Our commitment to honesty, fairness, and integrity drives every interaction, ensuring clients receive 5-star service from initial consultation to project completion. We specialize in residential and commercial HVAC repairs, installations, and preventative maintenance, offering 24/7 emergency services to address urgent needs.

Our team combines technical proficiency with personalized care, educating homeowners on HVAC maintenance to prevent future issues. With a focus on quality craftsmanship and customer satisfaction, we stand by our work and guarantee timely, reliable solutions for all heating and cooling challenges.
Services
HVAC Repair Plumbing Services Emergency Plumbing Leak Detection Commercial HVAC Maintenance
Served areas
  • Round Rock, Georgetown, Cedar Park, Hutto, Pflugerville
Details
  • Year established: 2021
  • Employees: 10
  • Licensed
Highlights and features
  • We are family-owned with over 20 years of HVAC industry experience.
  • Our team offers 24/7 emergency service for urgent heating and cooling needs.
  • We provide preventative maintenance programs to extend system longevity.
  • All technicians are fully licensed and insured for residential and commercial work.
  • We guarantee timely, high-quality service with transparent communication.
Payment methods
  • Cash
What people say
Fast and responsive Amazing and quick Excellent service Highly recommended Professional and communicative
Services
HVAC Repair
Our HVAC repair services address urgent heating and cooling system failures with rapid response times. Technicians diagnose issues like refrigerant leaks, thermostat malfunctions, and compressor problems. We prioritize restoring comfort while ensuring energy efficiency and system longevity.
Plumbing Services
From slab leaks to water heater installations, our licensed plumbers handle residential and commercial plumbing challenges. Services include drain cleaning, fixture repairs, and hydro-jet clearing for clogged pipes, with 24/7 availability for emergencies.
Preventative Maintenance
Bi-annual HVAC and plumbing inspections prevent costly breakdowns. Our maintenance packages include filter replacements, system tune-ups, and safety checks to optimize performance, reduce energy costs, and extend equipment lifespan for homeowners and businesses.
Emergency Plumbing
We offer round-the-clock emergency plumbing services for urgent issues like burst pipes, severe leaks, and sewer backups. Rapid response teams arrive equipped to handle critical repairs, minimizing property damage and restoring functionality swiftly.
Leak Detection
Advanced leak detection technology pinpoints hidden water leaks in walls, foundations, or underground lines. Our specialists repair slab leaks and pipe corrosion with minimal disruption, using trenchless methods where possible to preserve property integrity.
People
JJ
Owner
Owner JJ brings over 20 years of HVAC industry experience. Committed to family values and exceptional service, he leads Cool Kids with integrity and expertise, ensuring every client receives personalized attention and reliable solutions.
Ricky
Master Plumber
Master Plumber Ricky specializes in slab leak detection and complex plumbing repairs. With decades of field experience, he provides accurate diagnostics and cost-effective solutions, earning consistent praise for professionalism and technical skill.
Darin
HVAC Technician
HVAC Technician Darin combines technical expertise with customer-focused service. He excels in system diagnostics and installations, known for clear communication and meticulous attention to detail during residential and commercial projects.
Questions
How often should I replace my HVAC air filter?
Disposable filters should be replaced every 30 days, pleated filters every 90 days, and media filters checked every 6 months. Regular replacement improves air quality and system efficiency.
Do bigger air conditioning units perform better?
No. Oversized units cool faster but reduce humidity poorly, leading to mold risks. Proper sizing by a licensed technician ensures optimal efficiency and comfort for your home.
How long do HVAC systems typically last?
HVAC systems last 12-15 years. Older systems lose efficiency, increasing energy costs. Modern units with 10-year warranties offer better performance and energy savings compared to outdated models.
Can I replace just the outdoor HVAC unit?
No. Older systems use phased-out refrigerant R-22. Modern units require R-410A compatibility. Replacing only the outdoor unit creates inefficiency, so full system replacement ensures proper refrigerant matching and SEER compliance.
How often should HVAC systems be serviced?
We recommend bi-annual maintenance: once in spring for AC and fall for heating. This prevents breakdowns, reduces energy costs, and extends system lifespan through professional inspections and tune-ups.
How can I improve indoor air quality?
Seal duct systems to block contaminants, then consider professional cleaning or advanced filtration installation. Our Clean Air Package includes solutions tailored to your home's specific air quality needs.
Reviews (18)
Jon Huthsing
May 21, 2025 Report
Called them again, and amazing experience per usual. They came out, figured out the problem, and solved it with in the hour. Please give this place your business. The owner is a good person who cares about you and the job they do. I don't even bother calling other HVAC places anymore. Just call Cool Kids and the problem will get solved at an affordable price.
Terry Inselmann
May 14, 2025 Report
My AC stopped cooling last night and the owner of Cool Kids was able to fit me in to fix the issue this morning, quickly and for a reasonable charge. I'm so thankful the house is cool again! Great experience, nice, knowledgeable, professional, it's a blessing to find good folk to keep a home in good condition. Thank you, Cool Kids, and to others who recommended them.
Ann & Marty
Apr 23, 2025 Report
Russell with Cool Kids HVAC Service is really knowledgeable, super professional, and has kept our heater plus AC working great. Many thanks Russell and everyone at Cool Kids for making this happen.
Jaime Manzano
Apr 13, 2025 Report
Tech was on time and did the work without any issues. Good communication on what was done. Always receive good service from this company and will recommend to anyone.
Nick Martinez
Jun 13, 2022 Report
Awesome service, they were out with the part needing to be replaced in a manner of a couple hours. Guy was super nice and thorough with the job. Went over a few things and explained some better care for our unit. Definitely calling when time to replace or need service again!
Mike Ressel
Jun 12, 2022 Report
JJ really helped us out today, he was able to come out quickly and get us up and running with a new capacitor fast. He was easy and fast to schedule by texting. Very professional and easy to work with, he was straight up and honest and charged a fair rate. I liked the convenience of paying the invoice online, too. We appreciate that our kids can sleep comfortably tonight. Thank you.
Gustavo Guerrero
Jun 05, 2022 Report
Great service, professionals and honest. JJ did an awesome job fixing a drain issue we had with our A/C. He was very helpful from the moment he answered the phone. He provided some instructions in preparation for his arrival. He showed up on time and kept us in the loop at all moment. I will use them again and recommend to anybody looking for a good and honest HVAC service company in town
Kairi Ketchum
May 31, 2022 Report
Cool Kids was fantastic to work with today. He came out same day and was super easy to schedule all via text. Originally scheduled to be here at 4pm and texted ahead of time and asked if he could come 30 minutes early so that was a great start! Our downstairs AC stopped blowing cold and once he took some readings of the coolant and saw the construction work he knew exactly what happened. It turns out that our contractors replacing siding to our house accidentally put a nail through our copper refrigerant line going up in the wall to the attic.

He was super easy to work with and explained everything. He stayed out and worked with the contractor get into the right spot and found & fixed the hole, and refilled the unit. He also went super above and beyond to fix/improve our other hvac for upstairs while he was here too and was super easy to work with and even did the invoice for the work in two parts since the contractors are covering the accident piece. Definitely save this guy's info for any hvac work you need done
Tamela Plaster
May 09, 2022 Report
JJ took care of our problem quickly and efficiently. He explains his work and does a professional job. We really appreciated his fast response when we needed him. We will definitely use this company in the future. Two thumbs up
Kimber Vance
Apr 03, 2022 Report
We've been using Cool Kids for a while now to help keep our dinosaur A/C unit working with minor repairs and maintenance. Recently, my husband and I knew it was time to replace the original system that came with our 23 year-old home. JJ and his team did a solid job replacing our system and we couldn't be happier. He gave us a competitive quote to replace the AC unit, furnace, and ducts. They showed up on time and were in and out in a timely manner.

They hauled off our old unit and were impeccable with their cleanup. We instantly felt a major difference in the flow and quality of air. Our home cools down and warms up quickly. What a difference! Also, we had a huge dust issue which is now resolved, and we couldn't be happier with the results. Friendly, professional, and highly recommend!
Phillip Bachus
Feb 21, 2022 Report
Can't thank JJ and the team over at cool kids enough. They came through when we we're in a bad spot. Gave us options and we we're able to get a bigger unit and at a cheaper cost than other competitors. JJ was out of town during install, but called and made sure everything was perfect. Incredible service! Services: Thermostat repair, Heating system installation, Install AC
Ashleigh Sanchez
Feb 08, 2022 Report
As a new homeowner in Texas, having the AC in good condition was a high priority. I saw the Cool Kids AC & Heat truck driving up AW Grimes and liked the logo and snapped a picture. I later looked up reviews and everything looked good. When I wanted my AC looked at to assess and service, I reached out to Cool Kids. JJ responded promptly and was extremely flexible. He was very transparent with everything he was looking at / doing and options of services.

He even taught us how to do our own maintenance on the outside unit! Everything was reasonably priced considering all that was done. Definitely have this number saved as a contact and will be the first call if my AC is acting up! Let the before and after photo speak for itself!
Ben Fisher
Jan 07, 2022 Report
We just bought a new house, and had a nye party with our family and friends. Hours before midnight the ac quit working. which with so many people made things start to feel pretty uncomfortable. JJ the owner of cool kids basically dropped whatever he was doing and was able to get our system diagnosed and provide a temporary fix to have cooling for the coming days while we waited for a part to be available after the holiday.

I am extremely grateful and impressed with his willingness to make such a service call, and his wealth of knowledge about his craft. All that aside, I would have gladly paid top dollar but JJ's pricing was super reasonable. You can't go wrong with this man and his company for anything you need related to ac /hvac repairs.
Kale Snider
Jan 07, 2022 Report
My AC went out on new year day and Cool kids AC & Heat was out within a few hours and had us up and running in an hour. JJ was super professional and really fast to diagnose and fix the issue. I'd recommend him to anyone! Service: A/C system repair
Ben Fisher
Jan 06, 2022 Report
We just bought a new house, and had a nye party with our family and friends. Hours before midnight the ac quit working which with so many people made things start to feel pretty uncomfortable. JJ the owner of cool kids basically dropped whatever he was doing and was able to get our system diagnosed and provide a temporary fix to have cooling for the coming days while we waited for a part to be available after the holiday.

I am extremely grateful and impressed with his willingness to make such a service call, and his wealth of knowledge about his craft. All that aside, I would have gladly paid top dollar but JJs pricing was super reasonable. You cant go wrong with this man and his company for anything you need related to ac /hvac repairs.
Jim Sotelo
Nov 18, 2021 Report
Cool kids replaced my HVAC in my house about 2.5 years back. Job was done super quick and they cleaned up after. AC and heat ran perfectly since then and more efficiently as well. Saved me about 50$ in each summer month compared to my original unit. Selling my house now and needed some minor changes done. They came out and fixed everything and cleaned out the dryer vent as well. Ive recommended them to several friends and they replaced the HVAC system in my moms place too. Cant say enough good things about Cool Kids!
Christy Garza
Oct 27, 2021 Report
It's been 3 hours since we noticed a leak in our ceiling and with in those 3 hours we were able to have Cool Kids come out and fix the issue! I called other places before contacting Cool Kids and the amount they quoted us was insane and the wait was days.. Cool kids was able to arrive with in a hour of contacting them and I paid a third of what everyone else quoted me. I highly recommend contacting them not only did they arrive very quickly and we paid a very very great amount for the service he provided but he was also very knowledgeable I had no hesitation asking him questions. Thank You again for everything you did for us this evening!!
Ashley L.
Sep 04, 2021 Report
I was looking for quick service a few days ago and Cool Kids responded. Very professional , knew their stuff. Will be my go to moving forward. **** Update JJ actually was able
To get my equipment warrantied for me and fixed the long term problem no one else has been able too!!!