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Avatar for ALL-STAR AIR PROS LLC
ALL-STAR AIR PROS LLC
4.8(
20
)
Central A/C - Service or RepairAir Ducts & Vents - CleanElectric Furnace / Forced Air Heating System - Install+8 more

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Russell was very thorough. He checked everything, asked me questions, and showed evidence of issues. He did more than simply fix a problem. He educated me on how to determine when a problem is arising. He offers a phenomenal benefit plan to keep HVAC unit in great condition year round. I would highly recommend him for your HVAC needs."
Clean Air
Breathing problems
Heat Pump A/C
Furnace A/C
Duct Work, Works

+2

Response time3 hrs
Response rate100%
5 neighbors recently requested a quote
Harold's AC Repair
4.9(
24
)
Central A/C - Service or RepairElectric Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - Repair+2 more

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2008

Free estimates

Credit card accepted

"Twice in 4-5 yrs. Harold responded later in the day of the call both times. Both times repairs were made immediately and were effective. Harold is my gi to HVAC guy"
Response time6 hrs
Response rate89%
7 neighbors recently requested a quote
Avatar for Bakers Residential Experts
Bakers Residential Experts
4.5(
16
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+18 more

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"My HVAC unit quit working with temperatures in the 90's. I made an appointment, and Bakers updated me via text so I would know precisely when the technician would arrive. The technician was professional, courteous, and knowledgeable. He found and resolved the HVAC issue in short order. Pricing is very reasonable. I recommend this company without reservation."
Split Heat Pump
Response time11 hrs
27 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Swift Services Heating & Cooling, LLC
Swift Services Heating & Cooling, LLC
4.0(
65
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+10 more

Serving Johnsonville, SC and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Emergency services offered

"The technician's (Tim and Chaun) that did the installing of my HVAC were courteous and professional. Tim made sure everything was working to his satisfaction before he left and told us he would check back in a day or so to make sure it was functioning properly. My wife and myself very pleased. I should also state two years ago we had a new HVAC installed by Swift and continually had problems with it. After many service calls with little luck correcting the issue, Swift installed a new unit. Five more stars to Swift for integrity!"
Response time10 hrs
60 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Hill Plumbing & Electric Company Inc.
Hill Plumbing & Electric Company Inc.
4.5(
41
)
Electric Furnace / Forced Air Heating System - InstallCentral A/C - InstallCentral A/C - Service or Repair+47 more

Serving Johnsonville, SC and surrounding areas

Approved

In business since 1925

Free estimates

Emergency services offered

Hill Plumbing & Air has been proudly serving the Sumter and Florence communities since 1925 with expert plumbing services and now Heating and Air Conditioning services as well. Our goal is to continue the proud tradition and build successful longstanding relationships with our customers through providing quality service, offering competitive pricing and going above and beyond with attention to detail in everything we do. We take pride in our services and educating our customers as well!\n

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+14

Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Local Heating&Cooling
Local Heating&Cooling
New to Angi
Air Ducts & Vents - Clean

Serving Johnsonville, SC and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Locally owned and operated company. We pride ourselves on being honest with the homeowners. We give free estimates and free second opinions as well. Can’t count the amount of times we’ve gone behind other companies to find out that there were lies being told and homeowners stressing themselves out for minor or no problems at all. So don’t hesitate to call us and stay comfortable in your home.

1 neighbors recently requested a quote
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Heating and Air Conditioning questions, answered by experts

If your HVAC system's capacity doesn't match the required CFM (Cubic Feet per Minute), imbalances can occur. An undersized system struggles to maintain desired temperatures, leading to discomfort. An oversized system might short-cycle, wasting energy and causing temperature fluctuations. Properly matching capacity to CFM ensures efficient and consistent heating, cooling, and home ventilation system performance.

If you don't clean your AC evaporator coils, dirt and debris will build up, which impairs the system's ability to transfer heat. This forces the unit to work harder, leading to inefficient performance, higher energy bills, and frequent breakdowns. Over time, neglected coils can corrode, which may cause refrigerant leaks, or develop mold, ice buildup, and a clogged condensate drain, resulting in poor air quality and an uncomfortable home.

If there’s a freon leak in your home’s AC unit, it will cause the system to work overtime to cool the house. That issue will result in higher energy bills and it will take much longer for cool air to disperse throughout the home. If your system has a freon leak during the summer, it can make hot days miserable. That’s why it’s important to hire an HVAC professional to resolve a freon leak as quickly as possible.

They can, but it’s not as common. Window AC units are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it’s still important to leave refrigerant management in the hands of professionals when window units need work.

If you have central air conditioning, it’s fine to run your AC all day if that’s what you want—as long as the AC unit is in good condition. But if your AC runs constantly when you don’t want it to, there may be a problem with your system (like the ones we’ve mentioned above). Window AC units and wall air conditioners aren’t as powerful as central AC, so you should only run those kinds of air conditioners for eight to 12 hours at a time.

The Johnsonville, SC homeowners’ guide to heating and air conditioning services

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