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

Avatar for JOYCE COOLING & HEATING INC
JOYCE COOLING & HEATING INC
4.8(
206
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Derry, NH and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"My wife and I just had Joyce Cooling and Heating install duct work, air conditioning unit (Lennox) as well as a ductless mini split in our lower level. We received three bids for the project and selected Joyce for several reasons including, the salesman (Abe) that helped us and his level of responsiveness and consistent communication. We also liked the brands that Joyce partners with and installs - Lennox and Mitsubishi and from my research are the two best brands on the market. Our positive experience continued after we made the selection to hire Joyce for this large (4 day) project. They scheduled us in within days of making the decision and showed up early the first day (big bonus points in my book). The caliber of professionalism, courteousness, thoroughness and communication was present in every aspect of their work and across all of their employees. After each day they cleaned the work area and made sure it was left the way they found it. They completed the job earlier than expected and we are absolutely thrilled with the results. Each employee we interacted with at Joyce was polite, informative, friendly and knowledgeable. We have shared our positive experience with everyone we have spoken to about our recent home improvement and am a firm believer in voting with my dollars for businesses that deserve it and Joyce has won our vote. Keep up the great work guys! Well done Abe, Tyler, Harry & Bob!! Thank you!"
Additional Photos
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"THE CREW"
Air Conditioners

+4

Response time1 day
16 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Ace Hardware Home Services
Ace Hardware Home Services
4.5(
53
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Derry, NH and surrounding areas

Approved (Corporate)

In business since 1967

Free estimates

Emergency services offered

"Diagnosis and repair were straightforward and the talented Mike, who has done other great work for us on our ACs, had a replacement pump in his truck. Swapped over in under an hour. Cost of the repair was quite high, mainly due to very high price they charged for the pump. A Taco pump that I could buy for $175 was priced on this repair at more than $500. I get that it was an urgent situation and I’m happy to pay reasonably for the response but that mark-up bothered me. I called the office, had a long talk with the owner; sadly, she offered no consideration at all. Yes, it’s hard to find and keep skilled techs, but now seems that most HVAC firms have a business model like a car dealer’s service dept, far more corporate, less flexible or customer-considerate."
Heat Pump
Mitsubishi Hyper Heat
Multiple Ductless Heat Pump Installation
Additional Photos
Additional Photos

+6

Response time1 day
Response rate100%
4 neighbors recently requested a quote
Avatar for Kingdom Cooling
Kingdom Cooling
4.9(
53
)
Central A/C - Service or RepairCentral Humidifier - Install or ReplaceCentral Humidifier - Repair or Service

Serving Derry, NH and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"A great experience from start to finish. I found Kingdom Cooling on Angies List and the owner (Gerry) was very responsive and personable and explained to me in detail what he thought was going on after explaining the problem. He was able to give me a very accurate ballpark estimate which was very reasonable. Scheduling and timeliness of the repair was also done very quickly and efficiently. I would definitely recommend Kingdom Cooling for Service for sure!"
AC4
AC3
AC2
AC1
AC2

+67

Response time3 hrs
Response rate97%
5 neighbors recently requested a quote
Avatar for Palmer Gas & Oil
Palmer Gas & Oil
4.6(
89
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Derry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1932

Free estimates

Emergency services offered

"Palmer Gas & Oil just did an entire replacement of the 20-year-old central HVAC + humidifier + thermostats two-zone system in my home with a new state-of-the-art total system and I could not be more pleased. From start to finish each employee was personable, extremely knowledgeable, very courteous, and the consummate professional. There is truth to the adage that you get what you pay for and I know I got the best. All Gold Stars!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+11

1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Ethical Home Pro, LLC
Ethical Home Pro, LLC
4.9(
38
)
Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Derry, NH and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Mike and his team were very professional and they even finished a day early. I was totally impressed with the extra care they took in locating the air handler off to the side in the attic. All the vents look beautiful and I'm so glad I went with the central A/C. Thank you Mike and the whole team."
Condenser
Condenser
Air grill ceiling
Air grill ceiling
Air grill ceiling

+172

Response time6 hrs
Response rate95%
Recommended by100%of homeowners
Avatar for Comfort Air Services
Comfort Air Services
4.3(
22
)
Ductless Mini-split A/C - Install or ReplaceCentral A/C - InstallCentral A/C - Install - For Business+2 more

Serving Derry, NH and surrounding areas

Approved

In business since 2008

Credit card accepted

Offers commercial services

"I found Comfort Air online and reached out to install central AC in my mother's condo. Patrick got back to me promptly, was very receptive in answering all of my mother's questions, and was able to start job within a couple of weeks from first call. The job took two days total, and my mother was impressed from start to finish! I highly recommend Comfort Air."
HVAC Jobs
HVAC Jobs
HVAC Jobs
HVAC Jobs
HVAC Jobs

+18

Response time2 days
Response rate89%
13 neighbors recently requested a quote
Avatar for Revolution HVAC, LLC
Revolution HVAC, LLC
4.3(
22
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Derry, NH and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Saul, Matt and Nick take pride in their work and offered me the best possible solution. They are fast but thorough, going the extra mile to ensure a clean install. Very happy i hired them for the task."
Response time2 days
1 neighbors recently requested a quote
Recommended by93%of homeowners
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FAQs for air conditioning projects in Derry, NH

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 Derry, NH homeowners’ guide to air conditioning services

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