Summers in Boone, NC might be cooler than in other parts of the state, but that doesn’t mean your HVAC system isn’t working hard. Between humidity, temperature swings, and mountain weather, your air conditioning system has its own unique challenges in the High Country. At Edmisten Heating & Cooling, we’ve spent years helping Boone homeowners stay comfortable all summer long. Here are the top 5 HVAC problems we see every summer—and what you can do to help prevent them. 1. Frozen Evaporator Coils Yes, even in the summer your system can freeze up. Frozen evaporator coils are often caused by restricted airflow (usually from a dirty air filter) or low refrigerant levels. When airflow drops, moisture condenses and freezes on the coil—causing your system to stop cooling effectively. What to watch for: Weak airflow from vents Ice visible on indoor unit or lines AC running but not cooling Pro tip: Change your air filter every 1–2 months and schedule regular maintenance to avoid this issue. 2. Low Refrigerant Levels Low refrigerant means your system can’t properly cool the air. This usually indicates a leak, which needs to be located and repaired. Boone’s elevation and shifting temps can increase wear on HVAC lines and joints, making leaks more likely over time. Signs include: Warm air blowing from vents Longer cooling cycles Hissing or bubbling sounds near the unit Solution: Call our team to locate the leak, recharge your system, and get things running smoothly again. 3. Clogged Condensate Drain Line Your AC removes moisture from the air, which drains through a line to the outside. But in humid climates—yes, even in the mountains—algae and debris can clog this line, causing water to back up into your home or shut off your system entirely. Common symptoms: Water around your indoor unit Musty odors Sudden AC shutdowns Regular inspections and cleaning during seasonal tune-ups can prevent blockages and water damage. 4. Thermostat Issues In Boone’s variable climate, we see thermostats struggle with incorrect readings or sudden system changes. Sometimes, it’s just an aging thermostat—or it could be a poor location (too close to windows or vents) throwing off your temperature control. What to look for: Inconsistent indoor temps System short cycling or not turning on Unresponsive or blank thermostat Consider upgrading to a programmable or smart thermostat to improve accuracy and efficiency. 5. Outdoor Unit Obstructions Boone’s lush summers are beautiful—but leaves, grass, and even small critters can obstruct your outdoor condenser unit. When airflow is restricted, your AC system has to work harder, which can lead to overheating and eventual failure. What you can do: Keep at least 2 feet of clearance around the unit Gently hose off debris Check for signs of nesting or animal activity Beat the Heat with Expert HVAC Care in Boone, NC At Edmisten Heating & Cooling, we know the unique HVAC challenges that come with living in the mountains. Our local team is here to keep your system running efficiently so you can stay cool and worry-free all summer long. Need a repair, tune-up, or just have questions about your system? 📞 Call us today or schedule your service online

Summer in the High Country can be just as demanding on your air conditioner as any southern city—especially when temperatures spike in Boone, Blowing Rock, Banner Elk, and surrounding areas. While your AC is a lifesaver, constantly running it at full blast can lead to high energy bills, increased wear and tear, and even system failure. At Edmisten Heating & Cooling, we want to help you stay cool and efficient. Here’s how: 1. Use Ceiling Fans Wisely Ceiling fans don’t lower the temperature, but they do circulate cool air more effectively. Set them to rotate counterclockwise during summer months. This helps distribute the cool air from your AC and makes the room feel cooler—so you can raise the thermostat a few degrees without sacrificing comfort. 2. Close Curtains and Blinds During the Day Sunlight streaming through your windows is beautiful—but it also heats up your home fast. Invest in blackout curtains or thermal shades, especially on south- and west-facing windows. Blocking the sun during peak hours keeps your indoor temperature lower and reduces the strain on your air conditioner. 3. Seal Air Leaks Drafts aren’t just a winter problem. Leaky windows, doors, and ductwork can let cool air escape and let warm air in. If you’re noticing uneven cooling in your Boone home, it might be time to inspect your insulation and weatherstripping—or call us for a quick home energy audit. 4. Program Your Thermostat Smart thermostats are a game changer. Set it to increase the temperature slightly when you're at work or asleep. A 2–3 degree change during off-peak hours can make a big difference in your monthly bill without sacrificing comfort. Don’t have one? Edmisten Heating & Cooling can install and program a smart thermostat for you. Check out the smart thermostats we carry and install today. 5. Avoid Heat-Generating Appliances During the Hottest Hours Try to cook, do laundry, or run the dishwasher in the early morning or late evening. These appliances put off a surprising amount of heat and can make your AC work overtime. Consider grilling outdoors when it’s hot—Boone’s mountain evenings are perfect for it. 6. Keep Your HVAC System Maintained An efficient AC is a cool AC. Schedule seasonal maintenance with Edmisten Heating & Cooling to make sure your system is running at peak performance. We’ll clean coils, check refrigerant levels, and ensure all components are working properly—so you don’t run into surprises on a 90-degree day. 7. Add Shade Outside Your Home Planting trees, installing awnings, or placing reflective film on windows can all reduce the amount of heat that enters your home. Not only does this lower cooling needs, but it also adds to your property’s value and curb appeal. Trust Edmisten Heating & Cooling for Your Comfort Needs For over 50 years, Edmisten Heating & Cooling has helped Boone and the High Country beat the heat without breaking the bank. Whether you need a seasonal tune-up, a smart thermostat upgrade, or a full AC replacement, our experienced technicians are here to help. 📞 Call us at 828-264-0130