Had an issue with my HVAC continuously running without circulating. He was able to quickly diagnose…read morethe initial problem, and fixed it quickly. When further problems arose with the heating element, he meticulously troubleshot it, fixing issues along the way. He is clearly knowledgeable and maintained all of the replacement parts on hand, so he could fix the issues quickly. He fixed the issues in less than two hours, and the HVAC is running perfectly. Would definitely use again.

From the owner: DAD'S Thermostat LLC serves homeowners and small businesses throughout Copperas Cove with…read moreresidential and light commercial HVAC service. Whether you're dealing with a system breakdown, planning a new installation, or looking to improve indoor air quality, you need someone who understands the local climate and responds quickly. Central heat and seasonal cold place real demands on your heating and cooling equipment.

I first hired them a few years ago to replace my AC system, and the experience was…read moreoutstanding--professional work, fair pricing, and everything done right the first time. Since then, Brian has become my go‑to HVAC team for anything related to my rental property. What really sets Droptine HVAC apart is their honesty and integrity. Over the past few years, they've come out to my property multiple times to troubleshoot issues for my tenant, and not once did they charge me for those visits. In a world where quick upsells and unnecessary charges are common, this kind of honesty is extremely rare. They consistently show up on time, explain everything clearly, and genuinely want to help rather than profit from every call. It's hard to find service professionals you can trust--Droptine HVAC is one of those rare finds. If you're looking for knowledgeable, reliable, and truly honest HVAC service, look no further. I recommend them wholeheartedly.

Brian and the guys at Droptine did a phenomenal job replacing my evaporator coil. Honest team and…read moregood family-run business. He was really easy to work with from the start, always super informative and never pushy. He always got back to me quickly (I had some parallel home warranty things I was navigating at the same time and he also helped explain what was going on), and showed up when he said he would. That kind of reliability is hard to find! Overall, a smooth experience and I will 100% use them again, and recommend to all my friends. You should hire them too!

After some search for replacing old A/C system I contacted Alex, owner of Cool Time LLC, and was…read moreimpressed by his knowledge and level of communication with potential customer. He recommended me the best option and on March 25, 2026 year his co-worker Nima installed the new system. I was very lucky to choose this company because Alex and Nima really care for their customers. When later I found that the new thermostat was not proper working ,Nima came next day after my call and replaced at no cost with another model, which works well. Highly recommend this company and my best wishes to Alex and Nima.

I've worked with Cool Time on a couple of different projects, including a full HVAC replacement,…read moreand they have always been nothing but friendly, professional, and willing to work through obstacles together. They were the only local HVAC company that would even talk to me when I wanted to use my home warranty to help pay for costs, and that alone convinced me that this is a company that genuinely cares and wants to do right by their customer. It's been a pleasure, and I'm sure it will continue to be one. Thanks guys!

I needed my HVAC system replaced and upgraded to allow for better filtration and air cleaning in my…read morehome. I worked with about six or seven companies and decided on Killen Heating & Air Conditioning. Josh offered the best fit for my wants at the best price by far and wanted to work with me to see my project get done. His crew came out and were able to quietly remove my old system and keep the area clean. They got to work on installing the new system and kept me informed of all that they were doing. My dog was interested and they even reassured him and made friends. I'm truly happy that I chose this company - I'm looking forward to continuing business with them for the foreseeable future. They did a great job and befriended my family doing it. I definitely and highly recommend them for anyone with A/C issues!

Our AC went out, my home protection plan never called me to set up an appointment. When I called…read moreRob, he was available and got us up and running in just a couple hours for less than it would have cost me to pay for a service call technician. Great custom service as well as technical knowledge, I'll be a return custom for sure.

We had another HVAC company come out and do a full system replacement…read more They left multiple issues unresolved, leading to a compressor that never shut off, and a leak that turned into a waterfall in our downstairs kitchen. The previous tech ghosted on us and never came back to fix the problems. We called Tim from CenTex, and he came out about 15 minutes later. An hour after that, and he'd resolved all the issues, registered our warranty, and did a triple check on the system. Fantastic service!

I recently met Tim and he replaced one of our A/C units. He is very prompt, courteous, and helpful…read more I won't hesitate to contact his company for future issues.

Came out on very short notice. Found the A/C problem that was a low-cost fix compared to another…read morecompany that wanted to replace the entire unit and over-charge for coolant. He's a small-business owner who I can't recommend highly enough. Just absolutely great service all around.

At the worst time possible, during the period a winter storm hit the area, my heating unit went…read moreout. Explained to him my family had no heat whatsoever and I have two elders we are taking care of. Without hesitation, he came out asap and took care of the issue. Not only did he fix the problem, he also took the time to check my whole system to ensure all is running well and gave recommendations to prevent any more mishaps. Great customer service, great communication, very professional, most of all, very affordable. It's rare nowadays to get all those combinations. I found my AC/Heating guy. A+ Service, highly recommend.

Only giving 1 star because I have to in order to post. AHS put in a work order on a Saturday around…read more4pm. A gentleman called around 5:10 pm, who told me that they are closed and are closed on Sundays. He stated that the next available apt. he had would be Tuesday. I explained that this is an emergency due to my childs health condition and he basically could care less. Told me to all AHS back and try to get someone else to come out sooner. I would not use this company due to their lack of empathy, commitment to their job (after hours or not), and the take it or leave it attitude.

Blow fan on my A/C had gone out. They were able to make it out to me and get it back up and running…read moreall in the same day!