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Top-Rated Air conditioning pros in Cornelius - Updated Nov 2026

Avatar for Acosta Heating, Cooling & Electrical
Acosta Heating, Cooling & Electrical
4.4(
468
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Cornelius, NC and surrounding areas

Approved

In business since 1972

Warranties offered

Credit card accepted

"They didn't come on time at all.  The issue I had was that they had a price advertised for a system check and when they came they said that I had two different air conditioning units and it would be two different prices.  I felt that was a bit misleading and they didn't say that when I called to make the appointment. The guy that came was fine.  He was great.  I was happy with the service.  I just felt mislead."
AC Maintenance
Heating Repair
AC Maintenance
Heating Repair
AC Maintenance

+8

Response time11 hrs
Response rate100%
18 neighbors recently requested a quote
Avatar for Brothers- ARS Air, Heat, and Plumbing
Brothers- ARS Air, Heat, and Plumbing
4.5(
201
)
Central A/C - Service or RepairCentral A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Cornelius, NC and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1995

Free estimates

Credit card accepted

"From start to finish a great experience! Called with no air conditioning yesterday, a Friday holiday weekend. The lady that answered the worked wonders and found tech close by that could come the next morning. I received a call the tech was going to be earlier than expected. Great news on a hot day with no air. The service was efficient and fair priced. Within a hour my unit was up and running again. The sales office followed up right after to schedule a time to look a future options since my unit is getting up there in age. No pushy sales. Professional, quality service. I will use them in the future and highly recommend this company."
System Installation
509 neighbors recently requested a quote
Recommended by65%of homeowners
Avatar for Appalachian Air Ducts
Appalachian Air Ducts
4.8(
517
)
Air Ducts & Vents - Clean

Serving Cornelius, NC and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"I initially scheduled an appointment to have my dryer vents cleaned. Kevin arrived earlier than the scheduled time and that was much appreciated (he actually called to ask if he could come earlier). After he took care of the dryer vents, I asked if he could take a quick look at the fan/exhaust in one of my bathrooms and let me know if I could schedule a later date to have those cleaned. Not only did Kevin take a look, but he cleaned them with a smile and no extra charge. Kevin, with Appalachian Air Ducts, is a true professional and I will absolutely hire them in the future!"
Additional Photos
Additional Photos
Before
After
Response time2 days
1 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for NuBlue Air
NuBlue Air
4.4(
52
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+1 more

Serving Cornelius, NC and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"I called Mike on a Sunday night and he returned my call the next morning.  They came around lunch and checked on my AC unit which was freezing up and determined it needed some freon.  Charged the system and had me back in cool comfort in no time.  A couple of days later the other unit in my house was not coming on.  Impressed with the quick service the first time, I called them back.  Admittedly, I was thinking in the back of my head if the second vist could have been related to the first.  Turns out when they got the second unit open, I simply had a dead bug keeping a connection from making.  They cleaned out my unit and checked the freon in the second unit.  My fears about the two visits being related were quickly put to rest when the technician told my wife, there would be no charge for the second visit, since they had just been out a couple days before.  Thanks for the quick service and not taking advantage of a guy with a dead bug in his AC.
"
HVAC Installation Services
Vent & Duct Cleaning
Indoor Air Quality Solutions
Thermostats
HVAC Maintenance

+36

Response time1 day
11 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for GSM Services
GSM Services
4.7(
106
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Install - For Business+3 more

Serving Cornelius, NC and surrounding areas

Approved

In business since 1927

Free estimates

Emergency services offered

"They came out because our unit was not blowing cold air. The tech found a leak in the system and scheduled a time to replace the part. He refilled our refrigerant that day which was included in the price of the part. My family has used this company for years with no complaints."
New Air Conditioners
AC System Replacement in Charlotte, NC
Dust and debris from ductwork pulled into the duct cleaning machine
Ductless Mini Split Installation
AC Install Gastonia

+62

Response time1 day
40 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Hutch-N-Son's HVAC
Hutch-N-Son's HVAC
5.0(
34
)
Central A/C - Service or Repair

Serving Cornelius, NC and surrounding areas

Approved

In business since 2003

Emergency services offered

Customers say: True professional

"Chris did a great job replacing evaporator coil in our A/C system. Knowledgeable, punctual and friendly. The price was very competitive. Definitely recommend this company and will use them for future service and projects."
Response time3 hrs
Response rate96%
Recommended by93%of homeowners
Avatar for CLT Quality Air LLC
CLT Quality Air LLC
5.0(
20
)
Central A/C - Install

Serving Cornelius, NC and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"NC Quality Air provided excellent service from start to finish. The technicians were professional, knowledgeable, and took the time to explain everything clearly. The work was done efficiently and the quality really shows. I highly recommend NC Quality Air for anyone needing reliable HVAC service."
QPS Fleet
old unit
old unit
old unit
old unit

+75

Response time8 hrs
Response rate100%
27 neighbors recently requested a quote
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Air Conditioning FAQs, answered by experts

Yes, through thorough cleaning and inspection, optimizing functionality, and reducing energy use.

To keep your air conditioner in good working condition, you should have it serviced by a professional at least once per year, ideally in the spring before the cooling season begins. If your AC unit is 10 years or older, consider servicing it twice a year (once in the spring and once in the fall) to catch potential problems early and help it reach its full lifespan. During a service visit, a technician will inspect, clean, and replace parts as needed. Regular maintenance helps avoid costly repairs. As a DIY task, you can also clean the evaporator coils annually.

It’s normal to hear a low humming sound as air moves through your vents. Most of the time, you probably won’t even notice it. However, if that sound becomes disruptive or if you hear more concerning noises (such as rattling, clicking, banging, hissing, or grinding), there might be a problem with your HVAC system.

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

No, for two very important reasons. First, it’s illegal to release refrigerant into the air or ground since it can be toxic and cause environmental damage. Technicians typically pump old or extra refrigerant into separate tanks for special disposal. Second, without professional equipment to read refrigerant pressure and levels, plus the AC’s suggested requirements, it’s impossible to know if you’ve removed the right amount of refrigerant. Stay away from a DIY solution here and seek an expert with the right tools.

The Cornelius, NC homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.