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

Avatar for Williams Heating and Air, LLC
Williams Heating and Air, LLC
5.0(
67
)
Central A/C - Service or RepairCentral Air Cleaner - Repair or Service

Serving Dunn, NC and surrounding areas

Approved

In business since 2015

Free estimates

Small jobs welcome

"Mark Williams replied within an hour of my phone call, for which I was requesting an estimate for a repair and/or replacement of our 15-year-old heating and air conditioning unit. Mark came to the home the same day and provided reasonably priced estimates for both scenarios. I chose to replace the unit. The entire job was completed within three days of my initial phone call. I was charged the estimated price, even though Mark and his crew had to do unexpected work because they found defective wiring that did not meet the current code requirements and also replace a defective thermostat. They needed to crawl under the house to install the new wire, and while there, they also inspected the vent & ducting, as well as evaluated the overall sub-floor condition within the crawl space. They reported that everything was in great condition. I highly recommend Williams Heating and Air."
Response time2 hrs
Recommended by98%of homeowners
Avatar for Comfort Monster Heating & Air / G&M
Comfort Monster Heating & Air / G&M
4.6(
50
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Dunn, NC and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"In summary: They were - Friendly - Accommodating - Error prone, both in installation and in documentation. - Willing to work until they finally got issues fully resolved. More detail below: Eventually, with enough effort on my part, I think I got a good installation with an accurate invoice. I believe that they were interested in providing a good installation. But there were many errors along the way which only I caught so that they could be corrected, both with the installation and the invoice. They were extremely friendly and easy to work with. I, like many engineers, research systems like these before starting the quoting process. So I knew enough to know many of the items to watch for to ensure a quality installation. For instance, when their technician came out to do the quote, I asked if the following things would be done: 1) Flush the existing coolant lines to clean them out, 2) Check the CFM (cubic feet per minute of airflow), and 3) When brazing the copper supply lines, would they flood them internally with nitrogen to eliminate oxidation, which can cause reliability problems years later. The answer to all three of these was yes. However, at installation, 1) They did not flush the coolant lines. Later they told me that Carrier advises against it, which is fine. But why their technician say that they would do it? 2) They did not check the CFM, until after a couple of later requests from me to do it on a return visit. 3) Their technicians did not plan on brazing with nitrogen even though they had a tank of nitrogen with them. They said that they didn’t even know how to do a complete nitrogen braze, which means that they had been installing HVAC systems without doing it for years. I wonder about the reliability of those other installations. Eventually, another technician with more training arrived and showed them how to do it. In addition, during the installation, they did not level the compressor correctly until I pointed it out to them. They later fixed this. The first thermostat they installed was a nice one, but it was wired incorrectly. I found this and reported it to them. Also, it was the wrong type. It did not have a way to activate the HVAC’s special feature to reduce humidity beyond that which a typical system does. I paid quite a bit more for a system which had this feature, but unless I had noticed this, I never would have gotten it. They came out and replaced the thermostat with another thermostat with the humidity control feature. But for whatever reason, when it thought it was time to reduce the humidity, it just turned on the blower, which does nothing to reduce humidity. I found that neither of the first two thermostats was the more expensive one which Carrier recommended as part of the installation. I reported this to them, and they then came out to install the third thermostat which finally got things working right. They did not charge me anything for the more expensive thermostat. It took 5 different invoices from them before I got one which had no errors in it. Problems included: no factory rebate included, factory rebate added, rather than subtracted from price, wrong equipment listed, and wrong serial numbers. I caught all of these problems and had them fixed. They also found that they had to change the thermostat model on one of the revisions of the invoice. This worked to my benefit as the changed thermostat model increased my factory rebate considerably. Finally, after paying them, they did not send out a receipt showing that I had paid them, even though I was told that I would get one by email. After not getting it, they simply took the final invoice, and hand-wrote on it that it was paid, the amount, the date, and the name of the person who wrote this by hand. They scanned it and emailed it to me. When I asked if there was not a more formal receipt, they said that this is all they supply for those who ask for payment documentation. Again, I think their heart was in the right place. When there was an error found, they did everything they could to make it right. But it was generally me, not them, who found the errors. I am not an HVAC expert, but still found the issues. They were generally quite friendly to work with."
Carrier System
Best HVAC Company
Central A/C Repair
Heating & Air
Response time9 hrs
13 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Servtechs Heating and Air
Servtechs Heating and Air
4.8(
76
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business+1 more

Serving Dunn, NC and surrounding areas

Approved

In business since 2008

Free estimates

Credit card accepted

"My a/c wasn’t discharging cold air yesterday so I called at 9:00am and left a message they returned my call within 7 minutes and I had a worker at my house an hour after my callback! The worker fixed my unit within 20 minutes! He was very professional and courteous! 100% will recommend!!"
Goodman Condensers
Package heatpumps
Replacement
Response time1 day
32 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Dominion Service Heat and Air
Dominion Service Heat and Air
4.1(
183
)
Central A/C - Service or Repair

Serving Dunn, NC and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"Our AC broke at the worst time: Memorial Day weekend. We called several emergency repair companies before Dominion Services, but none of their emergency technicians got back to us. We waited for over twelve hours in our hot home for someone to call us back. Finally, we used Home Advisor to contact Dominion Services Heating & Air. We immediately got a call from the company to confirm our appointment! The technician (Tarone?) was at our house within an hour and had the problem fixed in 30 minutes. I could have cried I was so relieved. Excellent service. We will definitely be using them for all of our future HVAC maintenance and services!"
Homeowner
new hvac install
A/c unit
furnace
heat pumps

+7

Response time3 hrs
19 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for A & M Heating & Air Conditioning, Inc.
A & M Heating & Air Conditioning, Inc.
4.8(
21
)
Central A/C - Service or RepairCentral A/C - InstallCentral A/C - Install - For Business+5 more

Serving Dunn, NC and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"Very satisfied with the outcome. The house was not occupied while this work was being done, so I was not present during much of the work to observe the installation of system & ductwork, but it worked beautifully once we moved in and began to use it, a turnkey experience. Twice since then we've had questions (e.g., Can we move the ductwork in one part of the attic to accommodate new attic stairs?), and both times they were very responsive and came out at no charge to me, despite the fact that the work was done over a year ago. I've interacted with both Mike (the owner) and with one of his technicians, and have been very satisfied with the level of customer care I've received. I will use them in the future for our heating & A/C needs.
"
Mitsubishi Install
Roots
Broken Pipe
Repaired Pipe
Water Heater

+4

5 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for ARS / Rescue Rooter Raleigh
ARS / Rescue Rooter Raleigh
4.2(
249
)
Central A/C - Service or RepairCentral A/C - InstallCentral Air Cleaner - Repair or Service+3 more

Serving Dunn, NC and surrounding areas

Approved (Corporate)

In business since 1976

Free estimates

Credit card accepted

"ARS did a very good job installing my air conditioning unit. They took the time necessary to move a piece which was in the way of installation. Then it was put back in the appropriate manner and when a part didn't work, they rigged it to work until the part could be replaced. The part was replaced the next day and the AC works as it should."
New System Installation
401 neighbors recently requested a quote
Recommended by72%of homeowners
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FAQs for air conditioning projects in Dunn, 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 Dunn, NC homeowners’ guide to air conditioning services

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