Fast & Reliable Repairs for Any AC System
Our skilled and friendly technicians will respond quickly and diagnose the reason your AC isn’t working properly. Then we’ll get to work to make you cool and comfortable again!
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Proud To Be Charlotte’s Air Conditioning Repair Experts
When your air conditioner stops cooling, you need a repair you can trust. Harmony Heating & Air provides professional AC repairs for all makes and models throughout Charlotte, NC. Our experienced technicians find the problem fast and fix it right the first time. Homeowners have trusted our team for reliable cooling solutions for years.
Our Team’s Speed & Service Earns Charlotte’s Trust Every Day
We’re proud of the many great reviews Harmony Heating & Air gets from Charlotte-area homeowners like you who have turned to our team to fix the problems with their air conditioning. We respond quickly and explain what’s wrong and how we’re going to fix it.
No matter the issue, we’ll get your AC working again. Call 980-223-0660 now!
Before You Contact Us For AC Repair
When we hear that Charlotte homeowners are having trouble with their air conditioner, we’re happy to respond right away. But sometimes, we arrive at their home only to discover that the problem is so simple the homeowner could have handled it on their own. To save you time and money, we suggest you check these three common issues before reaching out to us:
Air filter: When was the last time you changed your air conditioner’s filter? Clogged air filters are a common cause of poor AC performance.
Thermostat: Is it possible that you’ve set your thermostat correctly … or even forgotten to turn the AC on? It happens more often than you’d think!
Outdoor unit: Sometimes, debris or plants clog up the screens on your home’s outdoor unit, which prevents it from operating properly and efficiently. Trimming foliage and using your garden hose to clean the screens can help. If you see that a fan blade is damaged or something is stuck in there, don’t try to fix it yourself.
If you’ve checked all three and that hasn’t fixed the problem, contact us. We’ll respond as quickly as possible, inspect and test your entire system, and fix the problem so you and your family will be comfortable again.
Common AC Problems We Fix in Charlotte
Air conditioners in Charlotte work harder than most people realize. Long, humid summers mean systems run nearly nonstop, and sudden spring or fall heat waves can push older units past their limits. Add in local factors like attic ductwork, heavy pollen, and summer storms, and it’s no surprise homeowners run into problems. We’ve seen it all — and we know how to get your system back on track quickly and reliably.
Hot Upstairs, Cold Downstairs
A classic Charlotte complaint, especially in two-story homes around Ballantyne and Concord. Heat naturally rises, but the real issue is usually undersized returns, leaky attic ducts, or an air handler that can’t move enough airflow. We often fix this with duct adjustments, added returns, or in some cases, zoning systems.
AC Running but Not Cooling
This one is simple to describe but frustrating to live with. In SouthPark and Uptown, where condensers often sit in tight side yards, airflow restrictions are common. Dirty coils, low refrigerant, or a bad TXV can all leave your AC blowing warm air even while it’s “on.”
Weak Airflow at the Vents
Sometimes it’s just a dirty filter. Other times, it’s collapsed flex duct, clogged coils, or old ductwork that was never sized for modern equipment. In Dilworth and Plaza Midwood, older ducts often have high static pressure, which robs rooms of cool air. We use static testing to pinpoint the restriction instead of just guessing.
AC Won’t Start After a Storm
Charlotte summers bring heavy thunderstorms. A quick lightning strike or power surge near Lake Norman can fry a capacitor, trip a breaker, or knock out a control board. Many of these are quick fixes once diagnosed, but ignoring them can leave you without cooling during the worst heat.
Frozen Indoor Coil
Ice on the refrigerant lines is more than a nuisance—it’s a red flag. Low refrigerant, weak airflow, or clogged filters are the usual causes. Left unchecked, a frozen coil can flood the drain pan as it thaws, which often means water damage in crawlspaces or attics.
Water Around the Indoor Unit
A wet floor near your air handler is usually a condensate problem. High humidity here in the Queen City breeds algae in the drain line. Once it clogs, the pan overflows. Crawlspace air handlers are notorious for this. We clear, flush, and treat the line so it doesn’t happen again.
Short Cycling
Quick starts and stops put huge stress on compressors. Oversized systems are the main culprit, but dirty outdoor coils or bad capacitors can trigger it too. Besides uneven comfort, short cycling drives up Duke Energy bills month after month.
Loud or Strange Noises
Some sounds are minor—like a rattling fan grill. Others mean trouble: grinding blower bearings, whistling ducts under too much static, or buzzing from an electrical short. We don’t just quiet the noise—we track down the cause so it doesn’t come back.
Musty or Burning Odors
Musty air on humid July days usually means microbial growth on coils or a clogged drain pan. Burning or plastic smells, on the other hand, could signal overheating wires or a failing motor. That’s when you should shut the system down and call immediately.
Thermostat & Control Failures
Sometimes the “problem” isn’t the AC at all. A dead battery, miswired smart thermostat, or bad sensor can lock out the whole system. We check the control voltage, staging, and settings to make sure your equipment and thermostat are speaking the same language.
The fastest way to solve these and other problems with your AC is to reach out to the team at Harmony Heating & Air. We’ll respond quickly to restore your comfort!
Contact Us For Prompt Assistance
If your home’s air conditioning has you losing your cool, there’s no need to be hot under the collar. Reach out to Harmony Heating & Air right away, and we’ll dispatch one of our highly skilled technicians to your Charlotte home as quickly as possible. They’ll identify the problem and tell you exactly what they’ll do to fix it. Stop feeling uncomfortable by contacting us right now!
Call 980-223-0660 today — we’ll fix your AC fast and keep you cool.
When an AC Problem Means It’s Time for Replacement
Not every breakdown calls for a new unit — but some issues are more than a quick repair. At Harmony, we walk you through the difference so you don’t waste money fixing a system that’s already on its way out. Here are some common repair situations and when they might point toward replacement instead:
Refrigerant Leaks
Small refrigerant leaks can often be sealed and recharged, but if your system is using older R-22 refrigerant (phased out years ago), repairs are no longer practical. Even with modern systems, a recurring leak in the coil can get expensive. If you’ve had multiple leaks or the system is 10+ years old, replacement is usually the more cost-effective choice.
Compressor Failure
The compressor is the “heart” of your AC. Replacing it is one of the costliest repairs, sometimes more than half the price of a new unit. If your compressor fails on a system that’s already out of warranty or past 10 years, replacement often makes more financial sense.
Evaporator / Condenser Coil Damage
Coils corrode over time, especially in humid climates like Charlotte where moisture and pollen combine to speed up wear. A single coil replacement can cost thousands — and if both indoor and outdoor coils are aging, a new system avoids throwing money at parts that will keep failing.
Electrical Failures and Control Boards
Capacitors and contactors are inexpensive, quick repairs. But when the main control board or multiple electrical components fail repeatedly, it’s often a sign the system is wearing out. Replacing one board might buy you a season, but replacing the unit can buy you another decade of reliable cooling.
Chronic Drainage, Moisture Problems
Clogged condensate lines are normal maintenance, but if water damage is recurring due to coil freeze-ups, rusted drain pans, or constant humidity overload, it may mean your AC is undersized, oversized, or simply worn out. In those cases, fixing the symptom doesn’t solve the bigger issue — upgrading to a properly sized, modern unit does.
Excessive Noise or Vibration
A loose panel or fan blade is an easy fix. But if your AC is rattling from a failing motor, worn bearings, or compressor issues, it’s often a sign of deeper wear. At that stage, we weigh the cost of repair against the age of the system — usually, if it’s past 12 years, replacement is the better investment.
In the end, whether your AC just needs a quick repair or it’s time for a full replacement comes down to balancing age, cost, and comfort. At Harmony, we don’t push you toward a new system unless it truly makes sense — our goal is to give you clear options so you can make the decision that’s right for your home and budget.
Not sure if your AC needs repair or replacement? Call 980-223-0660 for an upfront evaluation and a solution tailored to your home.
Common Questions Homeowners Have About AC Issues
Q: Why is my AC blowing warm air?
A: Warm air can mean anything from a clogged filter to low refrigerant or a failing compressor. In Charlotte’s hot, humid summers, these problems show up quickly. A technician can pinpoint the cause before it worsens.
Q: Why is my AC running but not cooling upstairs?
A: Two-story homes in Charlotte often struggle with airflow balance. Leaky attic ducts, undersized returns, or an unbalanced system are usually to blame. We test airflow and static pressure to find the fix.
Q: What does it mean if my AC is freezing up?
A: Ice on the lines or coil often points to restricted airflow or low refrigerant. Running the unit in this state risks water damage when the ice thaws. Shut it off and call for service.
Q: How long should my AC last in Charlotte?
A: With our long cooling season, most systems last about 10–15 years. Maintenance and usage patterns can extend or shorten that lifespan.
Q: My AC won’t turn on after a storm — what should I do?
A: Summer storms around Lake Norman and Uptown can trip breakers, blow fuses, or damage capacitors. First, check the breaker. If it’s fine and the system still won’t start, a professional needs to inspect the controls safely.
Q: Is AC repair in Charlotte expensive?
A: Costs vary based on the part and labor required. Small fixes like capacitor or contactor replacements are relatively inexpensive, while larger issues like coil or compressor failures may make replacement a better value. We provide upfront pricing so there are no surprises.
Q: Can I prevent AC breakdowns?
A: Yes. Regular maintenance — coil cleaning, duct inspections, drain line flushing, and filter changes — prevents many common failures. Harmony offers seasonal tune-ups to keep your system running strong through Carolina summers.
Other Air Conditioning Services
AC Installation
Whether you’re building a new home or replacing an outdated unit, we’ll help you choose the right air conditioning system for your space. We install high-efficiency central AC units that deliver quiet, consistent comfort—plus long-term energy savings.
Our technicians handle everything from system sizing to final walkthrough, ensuring your install is clean, code-compliant, and built to last.
Seasonal Maintenance
Regular maintenance keeps your AC system running smoothly, helps prevent breakdowns, and extends the life of your equipment. We offer seasonal tune-ups that include system inspections, coil cleaning, refrigerant checks, and performance testing to make sure your system is ready for the peak summer heat.
Maintenance plans are available if you prefer to set it and forget it.
Thermostat Services
Upgrade your comfort and control with a smart thermostat. We install programmable and Wi-Fi thermostats that let you adjust your home’s temperature from anywhere, saving energy and keeping your Charlotte home cozy on your schedule.
Ductless Mini Splits
Need heating for a room addition, older home, or hard-to-reach space? Ductless mini-splits deliver targeted comfort without the hassle of new ductwork. Perfect for Charlotte’s mix of mild winters and warm days, they heat and cool efficiently, room by room.