Top-rated air conditioning pros.

Get matched with top air conditioning pros in Cornelius, NC

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Air conditioning pros in Cornelius

Avatar for Comfort Monster Heating & Air / Absolute
Comfort Monster Heating & Air / Absolute
4.8(
236
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"We have used Absolute Comfort Heating and Air for over a year now. Each time we have used their services, Shawn has been able to find the cause of the issues with our systems without having to order major parts or replace the old systems. Shawn and his team are professional, dependable, trustworthy, honest, and the ABSOLUTE best out there. We were so lucky to find these guys after years of having bad experience with other companies. They went above and beyond to ensure our family (with new baby) was warm in our home- (ie: they came out the same day that we called and made a trip after hours to fix another issue) so thankful guys!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time1 day
76 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Acosta Heating, Cooling & Electrical
Acosta Heating, Cooling & Electrical
4.4(
467
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 1972

Warranties offered

Credit card accepted

"They come out every 6 months and do service on my unit. They check the air conditioning out in the spring and then the heating in the fall. I have been using them for 10 years. They are very responsive. The technicians are very knowledgeable and they are very reliable. They have always been very good with me. I haven’t really gotten a lot of experience in the last 10 years with anyone else. It has been very good."
AC Maintenance
Heating Repair
AC Maintenance
Heating Repair
AC Maintenance

+8

Response time11 hrs
Response rate99%
24 neighbors recently requested a quote
Avatar for Unique Air Heating & Cooling
Unique Air Heating & Cooling
4.8(
129
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"One of my existing AC units went out so I called 4 companies and they reviewed the conditions of all my HVAC systems. We determined that we should replace all 4 systems due to age and condition. Unique Air came out blow my other options and was able to schedule the job within 2 weeks. We are impressed with their pricing, customer service, completed job, and professionalism. We would Highly Recommend them to anyone wanting to repair or replace their HVAC systems."
 Heat Pump Installation
 Gas Package Unit install
 Our Vans Fully Stocked
Recommended by98%of homeowners
Avatar for Retro Air, LLC
Retro Air, LLC
5.0(
27
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Highly recommend! The air conditioner on my second floor was out. They were able to come check it out immediately. Rhett diagnosed the problem and had everything that he needed to repair it that day. I was even more thankful when I received the bill!"
York
York
General Installation
General Installation
Response time1 day
17 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Horne Heating and Air Conditioning
Horne Heating and Air Conditioning
4.7(
1,433
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 1983

Free estimates

Emergency services offered

"TONY HERRIN is our all time favorite heating and air conditioning professional. We've been blessed to have known him for 23 years. He is always thorough and explains all the work he does, while giving us an update on the system check list important for its continued peak performance. When any repairs have to be made, his work is of the highest quality. My wife and I ask for him every time we call for maintenance or service, and we're willing to wait for an opening in his schedule. Horne Heating and A/C recently merged with Quality Comfort Heating and A/C and they are continuing the fine service we came to expect with Quality Comfort. Top notch organization!"
clean new lines between home and unit
After - HVAC System on the right was replaced.
After - HVAC System
Previous AC Unit
A surge protector installed with the new system, protecting your investment

+20

Response time1 day
Response rate89%
39 neighbors recently requested a quote
Avatar for KS Kamara Heating & Air
KS Kamara Heating & Air
5.0(
81
)

Serving Cornelius, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Emergency services offered

Credit card accepted

"I had another provider servicing my furnace, but after my home warranty sent KS Kamara Heating and Air to diagnos my problem, I learned that the previous provider was not doing what was necessary. KS Kamara Heating & Air, diganosed the problem, show me why I was having the problem, took care of the problem and now my system is running as it should. I then hired KS Kamara Heating and Air on the spot. I was amazed at what was found when he serviced my unit. I look forward to a continue business relationship with this company. May thanks to KS Kamara Heating and Air."
Response time3 hrs
Response rate91%
25 neighbors recently requested a quote
Avatar for Hutch-N-Son's HVAC
Hutch-N-Son's HVAC
5.0(
34
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 2003

Emergency services offered

Customers say: True professional

"I had an excellent experience with Hutch-N-son's HVAC. They did an amazing job fixing my air conditioning, and now everything is working perfectly. The team was very professional, honest, and respectful throughout the entire process. They explained everything clearly and made sure the job was done right. I truly appreciate their hard work and great customer service. I definitely recommend them to anyone needing HVAC services!"
Response time3 hrs
Response rate96%
Recommended by93%of homeowners
Avatar for NuBlue Air
NuBlue Air
4.4(
52
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 2017

Emergency services offered

Warranties offered

"I called and Mike returned my call quickly and set up a date.  He came and checked the air conditioner.  He did not try to convince me it needed any else other than a check up.  Was quick and efficient and mannerly.  I would certainly use him again even for more serious repairs.
"
HVAC Installation Services
Vent & Duct Cleaning
Indoor Air Quality Solutions
Thermostats
HVAC Maintenance

+36

Response time1 day
10 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for GSM Services
GSM Services
4.7(
103
)

Serving Cornelius, NC and surrounding areas

Approved

In business since 1927

Free estimates

Emergency services offered

"I called GSM inquiring about their HVAC and insulation services. I also asked if I could have someone perform a Manual J load calculation (surprise to me, the Manual J calc was free!) as I felt that my existing heat pump was sized too small for my home (2.5 ton dual-zone single stage heat pump for 2200sq ft 2-story house). We agreed on an appointment time, and they sent Kelly out to my house. Kelly was very nice and professional, and did a thorough job explaining what all could be done and what my options were. Due to having so little room to work inside of the mechanical closest, you would have to remove the air handler completely just to wrap all of the duct work. Since I would be removing the old air handler that was 8 years old anyway, I decided to replace the entire system with a new Amana 3-ton 18 SEER dual-zoned heat pump. Kelly also told me they could seal up the hole & the mechanical closet so that hot air could no longer enter that space as well. I agreed to their quote, and they came out a week later (it would've been sooner but GSM wanted to make sure that the new system was designed properly, so they had to architect and design the layout of the new equipment to fit the small space) to do the work. Owen and Jason came out to perform the installation. They were both very professional & thorough, and they did an excellent job with the swap out & installation of the new heat pump. When GSM told me that it would take two days to do the work, I was prepared to be miserably hot trying to sleep at night with no air conditioning. Not only did GSM bring a portable AC unit for me use that evening so that wouldn't be the case, Owen and Jason actually got the heat pump wired and working the first day so I had full AC that evening, and the portable unit wasn't needed! They also insulated the attic space & mechanical closet with spray foam and foam board so the hot attic air will no longer be an issue. All in all, my experience with GSM has been great! They've been easy to communicate with throughout the entire process, they did an excellent job with the installation of the new equipment, and now I can rest easy knowing that everything has been taken care of!"
New Air Conditioners
AC System Replacement in Charlotte, NC
Dust and debris from ductwork pulled into the duct cleaning machine
Dryer Vent Cleaner Charlotte, NC
Ductless Mini Split Installation

+66

Response time1 day
51 neighbors recently requested a quote
Recommended by96%of homeowners
...
Showing 1-10 of 442

FAQs for air conditioning projects in Cornelius, NC

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

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.