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Best air conditioning pros near Frederick, PA

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

Avatar for Rohrer's One Hour Heating and Air Conditioning
Rohrer's One Hour Heating and Air Conditioning
4.7(
274
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Frederick, PA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1959

Free estimates

Emergency services offered

"I was shown pictures of problems that I did not know was going on. I have had a heat pump in my Attic and I showed that mold was in and around my unit. I am thankful to James for showing me this and I was told about equipment that can be installed to make sure that we do not breathe this air that can come into our house. I got the repairs done today. I asked James to send me information about the type of unit that they can install to help with this problem."
 Installations
 Technicians
 Office
  Installations
  Technicians

+16

82 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for J.P. Works, LLC
J.P. Works, LLC
4.9(
50
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Frederick, PA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"JP Works responded immediately to our request for an estimate. Dave did the preliminary inspection and estimate. Very knowledgeable and professional. Jim did a second inspection of our house and provided additional information about the work to be done. Jim and Victor did the installation of a new oil-burning furnace and central air-conditioning unit, as well as removing and disposing the old furnace and duct work. It was a professional job from start to finish. We were amazed at the amount of work that needed to be done, but Jim and Victor made it seem effortless. We are so grateful to finally have the central air-conditioning, just in time for the recent heat wave! We hired JP Works based on numerous positive online reviews and we were not disappointed. We highly recommend them!"
Response time6 hrs
25 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Dilling Heating & Cooling
Dilling Heating & Cooling
4.5(
44
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceAir Ducts & Vents - Clean+2 more

Serving Frederick, PA and surrounding areas

Approved (Corporate)

In business since 1999

Free estimates

Emergency services offered

At Dilling: Heating, Cooling, Plumbing & Electrical, we provide HVAC, Plumbing, and Electrical repair, maintenance, and replacement services in the Charlotte Metro and surrounding areas. We are available to you 24 hours a day, seven days a week, and can respond to your home's service issues within 24 to 48 hours upon initial request. Give us a call today! Dilling Does It - Since 1955!

5 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Petro Home Services
Petro Home Services
4.4(
1,786
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Frederick, PA and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"There was a snag at the beginning when they realized, after beginning to dig, that the AC unit was on top of the oil tank and they'd have to call someone in to move it before digging could continue. That delayed things a few days, but thereafter they did a good job of digging and were very careful with our trees. They also took care not to ruin the lawn with the machinery. The new tank and heater were quickly put in the basement with no problems."
Additional Photos
Additional Photos
Additional Photos
Response time6 days
Response rate100%
18 neighbors recently requested a quote
Avatar for Horizon Services, LLC (PA)
Horizon Services, LLC (PA)
3.9(
1,721
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Frederick, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Came out for emergency air conditioning service. Had to shut down air conditioning for a night to thaw out the ice that formed around the unit. We had to put up window units though because it was way too hot in the house to sleep. Originally, we were told we might need to replace our entire unit. After I called back stating our current unit was still under warranty, they came back the next day, and remarkably all we needed was a freon top off. Total cost for the 1/2 cup of Freon and initial visit = $300. I will not be using them again."
Horizon Services Heating/Cooling
Horizon Services Heating/Cooling
Horizon Services Heating/Cooling
Horizon Services Heating/Cooling
Horizon Services Heating/Cooling

+18

6 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for PerfecTemp Inc.
PerfecTemp Inc.
4.9(
16
)
Central A/C - Service or Repair

Serving Frederick, PA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Matt was prompt and gave his professional advice at no charge. In the end we donâ t need to install a centralized dehumidifier, but because of his honestly and level of experience we have decided to use this company for all of our future HVAC needs"
Heat Pump
Air Handler
Propane Boiler Installation
Response time4 hrs
Response rate87%
Recommended by83%of homeowners
Avatar for Dual Temp CO INC
Dual Temp CO INC
4.8(
6
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Service or Repair

Serving Frederick, PA and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

We’re your neighbors, here to bring HVAC expertise to your doorstep so you enjoy every moment at home. Give us a call today for the residential Heating, and Air Conditioning services you need, and beat the heat, the snow, and everything else mother nature throws your way. We serve Lehigh, Northampton counties, and the surrounding greater Lehigh Valley.

Outdoor Unit
Furnace Testing
Daikin Unit
Response time50 mins
40 neighbors recently requested a quote
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Air Conditioning FAQs, answered by experts

The right type of HVAC system will depend on several factors, including your climate, budget, preferences, and existing HVAC setup. For example, if you live in an area that experiences extreme weather, then a split system would likely be the best option. Or, if budget is a concern, consider installing a ductless system in just one room.

An AC drip pan may stop draining if there’s a clog where the drip pan connects to the drain line. Clogs can form from a lack of cleaning or from rust or corrosion buildup. Cleaning the drip pan at least once per month lowers the chances of debris clogging the drain line.

There are a few reasons your AC is running but not cooling your room. Thermostat issues and dust and debris, which can clog your system, are common problems. It could also be a broken component, such as a compressor, blower fan, or evaporator coils. You’ll need to call a pro to diagnose the issue.

Vents may blow air even though the air conditioning system is off because of the pressure difference between indoor and outdoor air or drafts from leaky ducts. Check for leaks or drafts in the ductwork or around windows and doors.

Most HVAC companies recommend against setting your AC below 70 as it could freeze up the system and cause more problems. Regardless of how hot it is outside, there is generally a 20 degree difference between the outside and inside temperatures, so even if it’s 100 degrees outside, your AC will likely not be able to cool your home to 70 degrees.

The Frederick, PA homeowners’ guide to air conditioning services

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