ThermoSTAT Heating & Cooling provides air conditioner installation for homeowners across northeast Tennessee. If your cooling system is failing or you need a new unit, our team delivers upfront pricing and professional installation backed by years of hands-on experience. We help you pick the right system for your home and get it running right the first time.
Posted on Lisa Russ2025-10-06Trustindex verifies that the original source of the review is Google. I would like to express my sincere gratitude to Matt for his exceptional service. He exceeded his responsibilities by adding a heat pump to my home purchase. Without prior acquaintance, he took the initiative to visit the property and assess the job requirements. On the same day, he contacted me to confirm that he could complete the task within a few hours, providing a reasonable price. I was delighted not only by the affordability but also by his ability to schedule the work for the following week. After searching for a month for someone to undertake this project, I encountered numerous companies unwilling to travel to my area. However, Matt not only accepted the job but also executed it with remarkable skill and efficiency, all while keeping costs manageable. I wholeheartedly recommend him and his company to anyone seeking honesty, quality workmanship, and a customer-first approach. Thank you, Matt, for your outstanding support "Lisa Russ"Posted on Brianne Hess2025-10-06Trustindex verifies that the original source of the review is Google. Matt and his team are amazing! Extremely professional and meticulous in their work. Matt is fast at addressing issues and accommodating when it comes to scheduling, even going as far as making weekend visits. His installation techniques and HVAC knowledge are something to be proud of! Best in LaFollette! Matt has faith in his units, and I have faith in Matt.Posted on Josiah Name2025-09-26Trustindex verifies that the original source of the review is Google. Scheduling was very simple and the person organizing dispatch was courteous. The technician was professional in appearance and behavior. Initially we had scheduled for an annual maintenance which was quoted at $199 but as it turned out we were having problems with our evaporator coil freezing so that was reduced to a diagnostic service call for only $80; that was my mistake for scheduling it as an annual checkup as opposed to a service call so I don't know that the tech was prepared to do cleaning and/or repairs. He did inspect the equipment however, after finding our return vents suboptimal are evaporator coil clogged and potentially a bad capacitor and dirty fan blades and our outdoor condenser was reportedly " very loud but in operable condition with no leaks in the system" he was adamant that we either spend several thousand dollars having them clean the air handler and replacing some maintenance Parts such as the capacitor, cleaning the fan, and replacing the evaporator coil which involves evacuating the coolant, cutting out the evaporator coil from the copper lines and resetting a new evaporator coil in its place. Alternatively we were offered the option to replace the outdoor condenser and the indoor Handler with some modifications being made to the ductwork to improve return air for approximately $9,000. I disassembled the air handler and cleaned the fan and had a technician from another local company come out and look at the system. they disassembled and cleaned the evaporator coil without having to cut the lines and then rechecked the pressures at the condenser and found the improvements in aiflow had raised pressures at the condenser and solved our freezing problem, he also took the time to evaluate our duct work and while not optimal for an older house the system setup is quite common and should be more than sufficient for the requirements of the air handler furthermore they offered to help us find appropriate filters for the returns to prevent the evaporator coil from getting clogged in the future and advised on appropriate filters to use at the air handler. they evaluated the condenser and found that it was no louder than normal and in good working order. How *long* it stays working... we'll see EDIT: after having a discussion with the owner Matt, I understand his point of view about wanting to remove the coil to clean it to prevent potential liability for damage to the lines that looked likely to occur. The options that he gave us a replacing components versus replacing the entire system were reasonable and allowed us to pick from within our interests and budget. It was not high pressure sales pitch or anything like that. but as always folks, if money is tight a second opinion on such a big project never hurts.Posted on Kristopher Herring2025-09-14Trustindex verifies that the original source of the review is Google. These guys are professional, and truly do everything to provide the best service. Very knowledgeable and not afraid to spread that knowledge with you. Matt is an excellent guy and I look forward to having more work done soon!Posted on Pamela Olivio2025-09-10Trustindex verifies that the original source of the review is Google. Very professional and works very good and cleans up. Would recommend them very highly.Posted on Eric Eyink2025-09-02Trustindex verifies that the original source of the review is Google. Thermostat Heating and Cooling were awesome to work with. Did exactly what they said they were going to do when they said they were going to do it. Highly recommend them for any HVAC needs.Posted on Sydney Anne2025-08-26Trustindex verifies that the original source of the review is Google. A big thank you to Matt and his crew! They were a pleasure to work with -- friendly, professional, informative, and efficient. Great customer service, work was done well and quickly, and all at a reasonable price.Posted on Lloyd Hicks2025-08-20Trustindex verifies that the original source of the review is Google. Fast and friendly service,diagnosed the problem in 10 minutes.Same day service tooPosted on Bob Schloemer2025-08-17Trustindex verifies that the original source of the review is Google. Excellent service from TH&C! Our A/C wasn't working when we arrived at Norris Lake and had guests for the weekend. Matt took the time on a Saturday to get our A/C working. Highly recommend.
Our process starts with a home evaluation. We look at your home’s square footage, insulation, ductwork condition, and cooling load requirements. This helps us recommend a correctly sized system for your specific needs. An oversized or undersized unit causes efficiency problems and comfort issues down the road.
Once you choose a system, we schedule installation at your convenience. Our technicians remove your old unit safely, dispose of it properly, and install the new equipment to manufacturer specifications. We check refrigerant levels, test electrical connections, verify airflow across all vents, and walk you through how to operate your new system.
For homeowners interested in alternatives to traditional central systems, we also offer ductless AC installation as a viable option for homes without existing ductwork or room additions. If you are replacing an aging window unit, our window AC installation service handles that as well.
We diagnose and fix cooling issues quickly, so you stay comfortable without long wait times.
Every system we install or service is chosen to fit your home’s size and cooling needs.
We’re proud to serve northeast Tennessee with dependable service and long-term customer relationships.
We’ve built our service approach around what homeowners actually need: clear communication, fair pricing, and quality work that holds up over time. Every job follows the same trusted steps from start to finish.
We present clear options and an up-front price so you can make the right call with full confidence — no pressure and no surprises.
Our certified technicians install your system to manufacturer specification and verify full performance before we leave the job site.
We check in after the install to confirm everything is running smoothly and answer any follow-up questions you may have.
From routine maintenance to emergency repairs and full system installations, we offer a complete range of heating and cooling services. Click any service below to learn more.
Northeast Tennessee’s challenging winter conditions demand reliable heating solutions that can handle everything from sudden temperature drops in the Appalachian foothills to ice storms that test your home’s comfort systems. Our comprehensive heating services encompass everything from traditional gas furnace installation to modern heat pump installation designed for the region’s unique climate patterns. Whether you’re dealing with an aging system in Johnson City or need a complete heating upgrade in Kingsport, we understand how mountain weather affects your home’s heating efficiency. Our certified technicians specialize in high-altitude installations and can recommend the most cost-effective solutions for your specific elevation and exposure. From electric furnace installation in areas where natural gas isn’t available to innovative radiant heat installation for consistent warmth, we provide heating solutions that work reliably in northeast Tennessee’s diverse terrain. Our team also handles emergency situations when winter storms knock out power or damage heating equipment, ensuring your family stays warm when temperatures plummet unexpectedly.
Complete HVAC solutions in northeast Tennessee require expertise in both heating and cooling systems that can handle dramatic seasonal temperature swings and high humidity levels common to the region. Our full-service HVAC approach addresses everything from smart thermostat installation that adapts to mountain weather patterns to comprehensive HVAC maintenance programs designed for the demanding Appalachian climate. The unique geography of northeast Tennessee, with its valleys and ridges, creates microclimates that affect how HVAC systems perform, making professional design and installation crucial for optimal efficiency. We specialize in integrated comfort solutions that include whole house humidifier installation to combat dry winter air and air scrubber installation to address allergens common in our heavily forested region. Our technicians understand how elevation changes affect system performance and can optimize your HVAC setup for maximum comfort and energy efficiency. Whether you need a complete system overhaul or want to upgrade individual components, our comprehensive HVAC services ensure year-round comfort regardless of what northeast Tennessee’s weather brings your way.
Furnace breakdowns during northeast Tennessee’s unpredictable winter weather can quickly become emergency situations, especially when temperatures drop below freezing in the mountain valleys. Our specialized furnace repair services address the most common issues affecting homes in this region, from furnace flame sensor replacement caused by dust and debris common in rural areas to gas furnace repair for systems stressed by frequent temperature fluctuations. The combination of high altitude, varying humidity levels, and seasonal temperature extremes creates unique challenges for furnace operation that require experienced technicians familiar with local conditions. We provide rapid response for emergency furnace repair situations, understanding that heating system failures can be life-threatening during severe weather events common to the Appalachian region. Our diagnostic approach addresses everything from furnace not heating repair to complex heat exchanger issues, ensuring your system operates safely and efficiently throughout the heating season. With parts readily available for all major furnace brands and 24/7 emergency service, we keep northeast Tennessee families warm when their heating systems face the region’s challenging winter conditions.
Summer cooling challenges in northeast Tennessee extend beyond typical hot weather, with high humidity levels and sudden temperature spikes that can overwhelm air conditioning systems throughout the region. Our expert repair services tackle everything from AC compressor repair caused by overworking during humid spells to emergency AC repair when systems fail during peak summer heat. The mountainous terrain and varying elevations create unique cooling demands that affect how air conditioning systems perform, particularly in homes located in sun-exposed valleys or shaded hollows. We specialize in diagnosing and repairing issues specific to our climate, including AC leak repair from humidity-related condensation problems and AC refrigerant recharge for systems working overtime in extreme heat. Our technicians carry extensive parts inventory for quick repairs and understand how local weather patterns affect different AC components. Whether you’re dealing with a system that won’t turn on during a heat wave or one that’s not cooling effectively in high humidity, our comprehensive repair services restore comfort quickly and prevent minor issues from becoming major breakdowns during northeast Tennessee’s demanding summer season.
Get answers to the most common questions about our HVAC services. Still have questions? Reach out to our team — we are happy to help.
Reliable service, honest pricing, and certified technicians — here’s what sets our team apart and why customers come back to us year after year.
A properly sized unit cools every room evenly, avoiding hot spots and cold drafts throughout your home.
When your AC matches your home’s square footage and insulation, it doesn’t need to overwork, helping you save on energy costs.
Oversized systems cycle on and off too often, while undersized ones run constantly. Both lead to faster wear and tear.
Correctly sized units remove humidity effectively, keeping your indoor air more comfortable during northeast Tennessee’s humid summers.
Proper sizing means less strain on the compressor and other key components, minimizing breakdowns and repair costs.
Have a question or need to schedule service? Fill out the form below and a member of our team will reach out to you with next steps.