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Avatar for Freedom Air Mechanical
Freedom Air Mechanical
4.8(
14
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Dover, NH and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Repairs were excellent and thorough "even well documented". The tech found units low on coolant. He identified and repaired multiple refrigerant leak points. I have dealt with many HVAC contractors over the years and Freedom Air Mechanical is one of the best. I highly recommend."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+36

Response time1 day
Recommended by92%of homeowners
Avatar for Pure Temp Heating and Cooling, LLC
Pure Temp Heating and Cooling, LLC
5.0(
18
)
Central A/C - InstallCentral A/C - Install - For Business

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Credit card accepted

"This was our second appointment......Jake was prompt, courteous and efficient. Reasonable cost too! He cleaned one of the mini-split units in record time. Then he found the leak in the system that's been a problem. Highly recommended! Appreciate your work and thank you for your Military Service!"
New Installation
Steam Boiler
Response time8 hrs
Response rate88%
2 neighbors recently requested a quote
Avatar for Palmer Gas & Oil
Palmer Gas & Oil
4.6(
88
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1932

Free estimates

Emergency services offered

"We have been a Palmer customer for 6 years. The front office and the technicians has always been great to work with. We have been using their AC and Heating Service Plan and on automatic oil and propane fill for years and we have never had an issue. My most recent experience was today for the AC Service Plan. The technician (David) was very polite, experienced, knowledgeable and respectful of our time and home. It’s always a great experience to have maintenance conducted in you home and have the technicians give you expert advice on your heating and AC system. Our AC system is well over 25 years old and still running strong thanks to Palmer. I continue to be impressed with Palmer and will remain a customer for the foreseeable future!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+11

2 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Kevin Russo HVAC
Kevin Russo HVAC
4.9(
71
)
Central A/C - Service or Repair

Serving Dover, NH and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"Kevin responded to my phone call asking for a quote. He arrived for our appointment on time. He was friendly, informative, and efficient. Kevin will be my first call the next time I have an HVAC problem or project."
HVAC INSTALLS
Samsung
HVAC INSTALLS
York  condenser
HVAC INSTALLS

+2

Response time2 hrs
Response rate88%
Recommended by97%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

Serving Dover, 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%
16 neighbors recently requested a quote
Avatar for Cornerstone IAQ Services, LLC
Cornerstone IAQ Services, LLC
4.9(
72
)
Air Ducts & Vents - Clean

Serving Dover, NH and surrounding areas

Approved

In business since 2015

Credit card accepted

Customers say: Quality work

"Owner operator Mike and his partner are outstanding. Did all my Heating and AC Vents and Main Lines also my Dryer Vent. I highly recommend them and would hire them again for any future needs. Mike is also a Veteran"
Before Picture Flex Ducting
After Picture Flex Duxting
Before Picture Flex  Ducting
After Picture Flex Ducting
After Picture Hard Ducting

+2

Response time1 day
Recommended by98%of homeowners
Avatar for Skovron Mechanical Services
Skovron Mechanical Services
4.1(
85
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Dover, NH and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Technician showed up ontime. There were no surprises. There were no "extra" charges or sale pitches to sell me things I didn't need. Technician offered suggestions and answered all my questions without hesitation. Thanks."
Commercial Cooling
Before Oil Boiler
Old
Oil Boiler
HVAC Roof Top Unit

+19

Response time9 hrs
Response rate100%
Recommended by84%of homeowners
Angell Electric
5.0(
20
)
Window A/C Unit - Service or Relocate

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Small jobs welcome

"Eric moved a junction box in my attic and installed a new ventilation fan in our bathroom. He was prompt to respond to my request, did great work, and cleaned up all areas afterwards. Price was great as well. I will hire him again."
Response time2 days
8 neighbors recently requested a quote
Recommended by27%of homeowners
Avatar for Pro Services
Pro Services
4.8(
146
)
Air Ducts & Vents - Clean

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Steve and team did an amazing job. They replaced the fireplace flue and left no dust and were very careful around the house and the roof. Excellent work, happy customer. Thanks!!"
Chimney Cap Installation
Smoke chamber before
Chimney Sweep Project
Fireplaces Project
Chimney Sweep Project

+36

Response time4 days
Response rate100%
36 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

No, it's not advisable to only replace the outside AC unit connected to your system. AC units are designed to work as a cohesive system, and older units work differently than newer units. Therefore, replacing only one component can lead to incompatibilities that affect the system’s performance. Replacing one component can void your warranty, costing you money for repairs.

You will only need to refill your AC with refrigerant if it has a leak. Otherwise, a modern, well-maintained AC will most likely never need a recharge. You may notice a leak in an older system if your bills are higher, you hear a hissing sound, or if the air is blowing out hot.

The length of an AC cycle depends on the settings in your thermostat and the unit you have. Central AC doesn't constantly run at full blast the way that a window unit does. A cooling cycle in most homes is 15 to 20 minutes. Then, the unit stays off for seven to 10 minutes to circulate the cold air in the house before the cycle repeats. It should repeat two or three times per hour. A short cycle lasts less than 10 minutes and then turns off.

When first installed, flex ducts shouldn’t cause airflow problems in your home. However, because flex ducts aren’t the sturdiest and require extra support, they lose their durability over time and begin to sag, which can inhibit airflow down the road. Also, if your flex ducts aren’t tight enough, your HVAC could work twice as hard for the same air pressure. If you’re worried about the airflow in your home, a rigid duct may be your best bet.

If the air coming from your AC unit is cool but never quite cold, there are a few reasons this might be happening. For starters, it could signal that your refrigerant levels are low. If there are no other indications of this particular issue, like hissing noises or frozen refrigerant lines, anything from dirty filters to damaged condenser or evaporator coils could be responsible for the problem.

The Dover, NH homeowners’ guide to air conditioning services

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