Excel Geothermal Ac & Heat, Llc

Excel Geothermal Ac & Heat runs HVAC work out of Rockwall County, Texas, with a clear focus on geothermal systems alongside conventional air conditioning and heating setups. The company has handled service calls for years in the area where summer heat and humidity put constant strain on units. The owner and his daughter produce a YouTube podcast that walks through how geothermal systems operate and takes questions from homeowners on dehumidifiers, routine upkeep costs, warranties, and federal tax credits. Their service vans show up regularly on local jobs, and the shop has wrapped dozens of them for visibility around the county.

Technicians handle everything from sealing persistent leaks in older conventional systems to topping off freon on units that have gone years without attention. Alejandro and Isai recently sorted out dampers that were causing uneven cooling across zones in one home, then cleared sludge from the drain line before it backed up further. Other calls involve full evaluations where crews find dirty filters and outdoor coils coated from skipped maintenance, restoring performance without major replacements. They arrive on time or early, check the full system while on site, and leave things running right without extra trips back.

Homeowners keep coming back because the crew delivers clean work that lasts, shows up fast when systems fail in peak heat, and explains every step without confusion. Reviews highlight the same points again and again: strong results on repairs like leak fixes that hold for multiple seasons, quick responses that prevent long breakdowns, and clear updates throughout the job. That steady performance across dozens of calls adds up to top marks in every area customers track. DIRT Score 4.86 from 84 reviews on Finds.

DIRT Score = confidence-weighted rating across verified review platforms. How is this calculated? →

“We have 2 conventional A/C systems and Excel Geothermal has been our A/C company for probably 7 years now. They did such a great job fixing a persistent leak back in the fall of 2021 that we haven't needed service till the spring of 2026. A bit of freon to top off one of the units and we're cooling well again. Michael was out on this visit. He was very kind, professional and quickly inspected, diagnosed, and addressed the issue. These guys have helped me and I consider them as my first call for A/C support!”

“The owner and his daughter have podcast on YouTube that explains how geothermal systems work, and he does Q&A from Reddit to answer homeowner questions about HVAC, dehumidifiers, maintenance costs, warranties, and federal tax credits. Our sign shop has wrapped dozens of their trucks and service vans since 2017, and their office is a breeze to work with -- very organized, tech-savvy, and zero billing issues.”

“Alejandro and Isai did a terrific job fixing our dampers, which had caused some overcooling in a couple of zones. I asked them to check the rest of the system and they found a bit of sludge in our drain line that they fixed. They were very courteous and efficient and best of all, a bit early! I've had Excel servicing our geothermal systems for a number of years now and they've always done right by us.”

“Our technicians did an outstanding job of evaluating and servicing our AC unit. It turns out there wasn’t a lot wrong with it, but a dirty filter and dirty coils outside from a lack of routine maintenance caused it to underperform. They were extremely polite, and professional, and I would absolutely use them again. Thanks, Mike”

“My Geothermal installation is almost 20 years old and somehow the core froze just as the Dallas summer heat hit us. Isai dropped everything and came by at 5:30 pm, Staying until 7:30 pm to diagnose the problem and somehow get it back up and running. This kind of dedication to their customers is why I’ve been a customer for almost 10 years now. He ordered the part then Michael and Jonathan came by on Friday at 3 pm to install the part. They also stayed until after quitting time and did a fantastic job installing the part. They like Isia maintained a high degeee of professionalism and a wonderful friendly attitude. Again, this is exemplary conduct and competence. We appreciate their steadfast work ethic and positive attitude. Any small business can learn from their business model and amazing work force”