Lonestar Mechanical Services

Lonestar Mechanical Services handles heating and cooling work as an HVAC contractor based in the Lago Vista area near Austin. Bruce runs the outfit and the licensed technicians focus on AC repair, heating system installation, maintenance calls, ductwork, blower replacements, and full unit swaps for homes and businesses. They cover hybrid systems, heat pumps, and split setups. The business keeps regular weekday hours from nine in the morning until five and stays closed on weekends.

Customers call them for sudden breakdowns during hot stretches, mismatched equipment that previous outfits left behind, and complete system replacements. Carlos Velez has diagnosed problems on site, explained the cause, and finished repairs the same day in multiple cases. Bruce stepped in on one job to spot incompatible oils that had wrecked an outdoor unit. Javier and his crew have completed installs in roughly two hours with solid cleanup afterward. Eric Slobodozian has handled quick fixes on indoor units and added a new thermostat at no charge when a warranty fell short. Joel Navejas has diagnosed issues, shown before and after photos, and answered questions without rushing.

The company serves Lago Vista and nearby spots including Georgetown. Reviewers note that technicians arrive at the scheduled time or earlier, explain the work clearly, and keep customers updated throughout. Calls get answered even when the schedule is full, and pricing comes across as reasonable for the scope of the job. Most service happens during regular business hours with fast turnaround on emergency repairs.

The Google rating sits at 4.9 from 412 reviews. Common points include staff knowledge, clear explanations of repairs, and prompt resolution of issues.

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“Lonestar has done a great job on our project. Carlos was very good at figuring out our issues and communicating with us every step of the way.”

“March 2026 Service Review: Expertise, Integrity, and a True God Send I can’t recommend Bruce, Javier, and the entire Lonestar Mechanical Services team highly enough. This is my second year using them, and they continue to prove they are the gold standard in HVAC service. This year, we had a major crisis. The owner, Bruce, personally stepped in to cover for a staff member and identified a catastrophic issue that a previous company had missed. Last year, another outfit installed a brand new mismatched air handler and component. Bruce explained that the two systems were using incompatible oils which had ultimately burned out our exterior heat pump. Bruce’s creativity and deep industry knowledge saved us. He engineered a solution to perfectly match the components and truly saved the day for us. Our HVAC hero! Javier Cervantes and his three person team handled the install of the outside equipment, and a new programmable thermostat. Their efficiency was staggering, the entire job was completed in just a couple hours. They were respectful, skilled, and it’s clear that Bruce has cultivated an amazing, God-honoring work environment that reflects in their craftsmanship. If you want a t”

“Carlos Velez did an outstanding job with our repair. He is knowledgeable and trustworthy. Carlos took the time to explain the cause of the problem and what needed to be done to fix it. Thank you so much for working diligently until everything was resolved.”

“Bruce was backed up with a zillion calls, but got me on their schedule, quickly. Eric came out and did an absolute magnificent job! Honest, professional, courteous...all the good words you can think of that you hope you experience, the two of them provided! I would give Lonestar a six-star rating, if I could.”

“Javier and the crew arrived earlier than I was expecting which was great. They got right to the job and completed the install without issue. Great job with the clean up and the system is working very well to this point.”

“CARLOS VELEZ, was the HVAC technician who came out and fixed our HVAC, and I couldn’t be happier with the service. He was able to get to us quickly when we needed help most during the recent summer sessions appreciate you Carlos. I’m also incredibly grateful to Bruce, the owner, who The all AC unit replacement, The technician was professional, explained the issue clearly, and fixed it the same day. The price was fair, and the whole process was easy. I’d definitely recommend them.”

“Carlos did excellent job. Answered all my many questions and was very pleasant and informative. Also, very efficient and got all aspects of my visit completed same day . Thank you to Carlos!!, and Lonestar!!!”

“Javier showed up on time. He and his crew were professional, helpful and installed my entire HVAC system in about two hours. I was very impressed! They did a great job and I will use them again if I need to.”

“Eric Slobodozian was awesome! He looked at my AC inside unit and knew exactly what was wrong. He was here 15 min ago and it's starting to feel cool already!”

“We needed a blower replacement on our unit in Georgetown, TX. Carlos showed up at the appointment time, was very professional, personable and attentive. He and Lonestar Mechanical Services was great to work with!”

“Our technician Carlos Velez was great. He explained everything thoroughly and got everything taken care of quickly. We would recommend Lonestar and Carlos to anyone needing services.”

“I had an outstanding experience with AC Service Manager Joel Navejas from LoneStar Mechanical Services. From the moment he arrived, he was professional, courteous, and incredibly knowledgeable. He took the time to thoroughly diagnose the issue, explained everything in a way that was easy to understand, and even provided before-and-after pictures so I could see exactly what was done. I never felt rushed, and it was clear he genuinely cared about doing the job right. His honesty, attention to detail, and excellent customer service made the entire experience stress-free. I highly recommend Joel and the entire team at LoneStar Mechanical Services to anyone looking for reliable, trustworthy HVAC service. Thank you for the outstanding work!”

“Eric showed up for our appointment and within moments was able to not only identify the issue but resolve it. I was impressed with his efficiency and customer service. Definitely will be recommending your services!”

“Eric Slobodzian went above and beyond! We found out my home warranty didn’t cover power surges - they bought me a brand new thermostat and installed it with no extra charge! Great company with great values”

“Came at an incredible speed. They were prompt, reasonable pricing and got us squared away. 100% recommend them. Javier Cervantes was our tech.”

“I appreciate this company for repair my AC unit!!! Especially the technician Eric Slobodzian!!! He was great, friendly and very professional. He knew what need to He done and it take him a very long time to do the job. So thank you Eric for everything!!!”

“Came through and took out our old unit and put in a new one in just about two hours. Incredibly impressive. Super nice and professional. Explained everything well. My family will be able to stay cool this summer because of them. Highly recommend to others!”

“Carlos was awesome and very insightful. He gave me tips on how to properly maintain my system and what to look for. Would recommend him again!”

“Javier Cervantes and the team just changed my HVAC unit. They were very professional and courteous. They did a great job, and I'm happy to use their high quality service.”

“5 Stars! I am very thankful for Lonestar sending Carlos out to fix my AC unit. Very timely and professional.”