Get matched with top air conditioning pros in Cornish, ME

Q: How long does an HVAC surge protector last?

• <div><p>Most HVAC surge protectors last about <b>three to five years</b>, depending on how often your home experiences blackouts or brownouts. If your unit is susceptible to more frequent electrical surges, consider replacing your surge protector every two years. Consult your HVAC professional to determine when and how often to replace your HVAC surge protectors.</p></div>

Q: Do you have to put water in a portable air conditioner?

• <div><p>Not if you have a standard unit. Because portable AC units actually work to dehumidify the room, you&rsquo;ll likely need to drain the unit from time to time&mdash;but you won&rsquo;t have to put water into it. There is, however, another type of air conditioner called a swamp cooler that requires water to operate. If you have a swamp cooler, you may need to fill a reservoir with water and potentially ice. But a swamp cooler is different from a standard portable AC unit.</p></div>

Q: Should a whole house dehumidifier run all the time?

• <div><p>You should only run your dehumidifier in warmer months, such as spring and summer, to get the best performance out of your system. The air gets drier when temperatures drop in the winter months, creating less of a need for a dehumidifier. However, when to run a dehumidifier will depend on your local climate.</p></div>

Q: Can I release some of the refrigerant in my AC unit?

• <div><p>No, for two very important reasons. First, it&rsquo;s illegal to release refrigerant into the air or ground since it can be toxic and cause environmental damage. Technicians typically pump old or extra refrigerant into separate tanks for special disposal. Second, without professional equipment to read refrigerant pressure and levels, plus the AC&rsquo;s suggested requirements, it&rsquo;s impossible to know if you&rsquo;ve removed the right amount of refrigerant. Stay away from a DIY solution here and seek an expert with the right tools.</p></div>

Q: Is it better to oversize or undersize AC?

• <div><p>It&rsquo;s critical to use the right size AC for your space and not go too small or too big. If you purchase an undersized unit, it won&rsquo;t properly cool your house, and it has to work harder to reach the optimal temperature. This will eventually wear your unit out. An oversized unit can spell trouble because it will turn off and on more frequently, which also wears out your AC unit. An oversized unit also causes humidity in the home.</p></div>

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Verified Reviews for Air Conditioning pros in Cornish, ME

*The Angi rating for Air Conditioning companies in Cornish, ME is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

*The HomeAdvisor rating for Air Conditioning companies in Cornish, ME is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

Last update on February 08, 2023

Reviewed in February 2023
Absolutely no customer service! My furnace was not even installed for two years before it started making a banging noise as it struggled for air. He came to evaluate it but left, and I never heard back from him. The back of the furnace is being held up by a case of mason jars! He mentioned...
Griffin Heating
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Reviewed in January 2023
They did a great job installing my heat pumps thank you
LaPlante Electric, Inc.
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Reviewed in December 2022
The installers that did the job were very nice and efficient and did a great job cleaning up
Clear Choice Home Improvements, LLC
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Reviewed in December 2021
Mark and Ryan were fantastic! I would recommend Airtech Heating and Cooling to anyone who values customer service along with expertise in the field. Our furnace went and we were without heat. I called Airtech for a quote and they were honest and caring about the situation and gave us the best...
Airtech Heating and Cooling, LLC
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Reviewed in June 2021
Brian found a creative way to install a portable air conditioner exhaust vent on a crank window by using a piece of Lexan, cutting a hole the size and shape of the vent and installing that in the window. It looks better than the original insert and works well with the crank window and I now...
Beckwith Glass Company
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Reviewed in January 2020
Ken installed a 6 unit mini-split system in my home. He not only provided a very competitive price but did an excellent job with the installation. I would highly recommend him for your plumbing or cooling project.
Kenneth R. Fish Plumbing, Heating, & Air Conditioning
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Reviewed in December 2015
Crew showed up when they were supposed to. The office communicated well about whether or not it was OK split the job between two days. Went the extra mile and fixed an additional that I pointed out I was having trouble with. Workmanship is excellent - fence is gorgeous. They cleaned up and...
RON FOREST & SONS FENCE CO
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Reviewed in December 2014
We had purchased the house in the spring and have been dealing with a lot of deferred maintenance from the previous owners. This was no exception. It appeared that the chimney and stove had not been cleaned since they were installed 5+ years ago. They were in a sorry state as they had been...
CHIMNEY SWEEPS OF THE FINEST KIND
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Reviewed in November 2014
Boy did I luck out! These guys are young, hard working, smart, and experienced. They inspected my house from top to bottom, <br /> suggesting energy saving improvements, and pointing out problem areas where warm air was escaping. Once the job began, <br /> everything they did impressed me....
Earthlight Energy Solutions
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Reviewed in September 2011
Best experience we've had with a contractor in quite a while. Their price, although not what I would consider cheap, was more than $2,000 below other estimates we had received (and for a more powerful system). Plus, Bill figured a way to place the system that hides virtually all of the system...
Gelinas HVAC
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Find Air conditioning pros in Cornish

Aire Serve of Southern Maine

4.5(

123

)

Central A/C - Install

Serving Cornish, ME and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"They were great! Told me I did not need a new furnace that the one I had was one of the best and in goid condition. Saved me thousands!"

22 neighbors recently requested a quote

Recommended by95%of homeowners

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Freedom Air Mechanical

4.8(

)

Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Cornish, ME 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."

+36

Response time1 day

2 neighbors recently requested a quote

Recommended by92%of homeowners

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Aire Serv of Southern Maine

4.6(

)

Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Cornish, ME and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"EXCELLENT / LAST PERSON DIDI IT IN40 MINUTES /AIRE TOOK2HOURS BUT DID IT BETTER"

23 neighbors recently requested a quote

Recommended by88%of homeowners

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HVAC Solutions 207, LLC

4.9(

)

Central A/C - Service or Repair

Serving Cornish, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Ryan, the owner, was very knowledgeable and responsive. He came right out to our home and diagnosed the problem with our split unit. I would highly recommend this company."

Response time5 hrs

Response rate96%

18 neighbors recently requested a quote

Central A/C - Service or RepairCentral A/C - InstallDuctless Mini-split A/C - Install or Replace+1 more

Serving Cornish, ME and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"Josh installed a new water heater, provided us with instructions on proper use and maintenance and has serviced it since. He is honest, thorough, and trustworthy. He also maintains my dad’s HVAC needs too. He has come out for emergency calls too. Suggest things to prevent future additional repair expenses. His prices are reasonable, especially for the personal, friendly customer service and service provided. I would highly recommend Northwoods HVAC."

4 neighbors recently requested a quote

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SEASIDE HEATING AND COOLING LLC

5.0(

)

Ductless Mini-split A/C - Install or ReplaceCentral A/C - InstallCentral A/C - Install - For Business+2 more

Serving Cornish, ME and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

We are extremely passionate about the work that we do. You can depend on us to provide a high quality service at a fair and honest price. We understand that the future of our business depends upon our reputation and that is why customer service is by far our highest priority. If you are looking for a professional you can trust, please call today to schedule a no-obligation estimate!

7 neighbors recently requested a quote

Ductless Mini-split A/C - Install or Replace

Serving Cornish, ME and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"Matthew and his crew were extremely professional and efficient. The work was completed on the day scheduled and they cleaned up after themselves. Heat pump works great and they were able to direct me to an Effeciency Maine site where I received a substantial discount on the installation, equipment and cleaning plan!! Great company to do business with and will recommend them to family and friends. I will definitely not hesitate to use this company again if the need should arise!!"

Response time1 day

Response rate100%

1 neighbors recently requested a quote

Air Ducts & Vents - Clean

Serving Cornish, ME and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Job was done in well and fast at an fair price Would recommend"

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Cottage Haus Cleaning Co

New to Angi

Air Ducts & Vents - Clean

Serving Cornish, ME and surrounding areas

Approved

At Cottage Haus, we want you to feel great about the space you live in. 🤍\n\nA clean home isn’t just about how it looks—it’s about how it makes you feel. Our goal is to create a space that feels fresh, comfortable, and ready for you to enjoy.\n\nClean spaces, happy home. 🏡✨

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South Sudan cleaning

New to Angi

Air Ducts & Vents - Clean

Serving Cornish, ME and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

I’m a hardworking wife and mother of 5. I’ve worked as a store manager at Amato’s for 9 years, people person and friendly and excellentat customer service. Before Amato’s I worked at a hotel for cleaning services and now I want to be my own boss.

26 neighbors recently requested a quote

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Showing 1-10 of 64

Air Conditioning questions, answered by experts

Most HVAC surge protectors last about three to five years, depending on how often your home experiences blackouts or brownouts. If your unit is susceptible to more frequent electrical surges, consider replacing your surge protector every two years. Consult your HVAC professional to determine when and how often to replace your HVAC surge protectors.

Not if you have a standard unit. Because portable AC units actually work to dehumidify the room, you’ll likely need to drain the unit from time to time—but you won’t have to put water into it. There is, however, another type of air conditioner called a swamp cooler that requires water to operate. If you have a swamp cooler, you may need to fill a reservoir with water and potentially ice. But a swamp cooler is different from a standard portable AC unit.

You should only run your dehumidifier in warmer months, such as spring and summer, to get the best performance out of your system. The air gets drier when temperatures drop in the winter months, creating less of a need for a dehumidifier. However, when to run a dehumidifier will depend on your local climate.

No, for two very important reasons. First, it’s illegal to release refrigerant into the air or ground since it can be toxic and cause environmental damage. Technicians typically pump old or extra refrigerant into separate tanks for special disposal. Second, without professional equipment to read refrigerant pressure and levels, plus the AC’s suggested requirements, it’s impossible to know if you’ve removed the right amount of refrigerant. Stay away from a DIY solution here and seek an expert with the right tools.

It’s critical to use the right size AC for your space and not go too small or too big. If you purchase an undersized unit, it won’t properly cool your house, and it has to work harder to reach the optimal temperature. This will eventually wear your unit out. An oversized unit can spell trouble because it will turn off and on more frequently, which also wears out your AC unit. An oversized unit also causes humidity in the home.

The Cornish, ME homeowners’ guide to air conditioning services

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

See all articles

Angi
•
Sep 11, 2026Sep 11, 2026
How Much Does Swamp Cooler Installation Cost? [2026 Data]
Discover the true swamp cooler installation cost. Learn about average prices, cost factors, and ways to save on your home cooling project.
Ginny Bartolone
•
Apr 4, 2026Apr 4, 2026
How Much Does It Cost to Install a Mini-Split? [2026 Data]
When your window AC isn’t cutting it, but central AC is too expensive, installing a new ductless mini-split AC may be the cooling solution you’re looking for. Find out what a mini-split costs and how to hire the right pros to get the job done.
Angi
•
Sep 16, 2026Sep 16, 2026
How Much Does Swamp Cooler Repair Cost? [2026 Data]
Get a clear estimate of swamp cooler repair cost, including average prices, key cost factors, and tips to save money on repairs for your home.
Alison Kasch
•
Jul 9, 2026Jul 9, 2026
Portable AC vs. Swamp Cooler: Which Should You Choose?
Choosing between a portable AC vs. swamp cooler comes down to energy efficiency, cooling preferences, and climate. Find out how these systems compare.
D.P. Taylor
•
May 22, 2026May 22, 2026
Is a Swamp Cooler Right for Your House?
Swamp coolers are cheaper to install and run than a central AC unit, but are they right for your home? This guide breaks down what you need to know.
Tyler Lacoma
•
Jul 9, 2026Jul 9, 2026
Mini Split AC vs. Central Air: What’s the Difference?
Learn the difference between mini split AC vs. central air. For example, central air has air ducts, but a ductless mini split AC cools without them.