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Q: Do window AC units use a lot of electricity?

• <div><p>Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts&mdash;meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.</p></div>

Q: Can professionals enhance A/C efficiency during servicing?

• <div><p>Yes, through thorough cleaning and inspection, optimizing functionality, and reducing energy use.</p></div>

Q: How much does it cost to replace an AC compressor?

• <div><p>On average, <a href="https://www.angi.com/articles/ac-compressor-cost.htm">replacing an AC compressor costs</a> between $800 and $2,300, but it could cost as much as $2,800. There are a few factors that impact the price of a compressor replacement, including the type and size of the compressor, as well as the type of HVAC system and local labor rates. </p></div>

Q: What is included in an HVAC service call?

• <div><p>Most HVAC service calls include diagnostic fees, which could include checking on a specific issue you&rsquo;re experiencing or running through a routine inspection checklist. If you called for a particular problem, the service call will also include an estimate to fix the issue, including materials and labor. Depending on your HVAC technician and the service you requested, you might also get a general inspection of your system components to ensure everything is working as intended.</p></div>

Q: Is it bad to have mold in your air conditioner?

• <div><p>Mold in your air conditioner isn't a good thing, as it can be harmful to your health. If the mold travels through the ductwork or is blown out of the A/C, you and your family can inhale mold spores and develop respiratory illnesses and other problems. Preventing mold from growing in the air conditioner will help protect your health.</p></div>

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Verified Reviews for Heating And Air Conditioning Service pros in Sumner, ME

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

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

Last update on June 30, 2026

Reviewed in June 2026
Josh was very helpful with cleaning and fixing my heat pump. I called him and he came out the next day. He knew what he was talking about and answered all of my questions. The service was great and I got a good price. Thank you.
Northwoods HVAC
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Reviewed in July 2025
Worked hard in the very hot and humid conditions. Very personable and gave me great advice on how to avoid problems in the future.
RM Septic
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Reviewed in June 2025
They were super helpful and the staff was so nice I recommend Able Trades to everyone they installed 2 heat pumps in my home and they are amazing iam so thankfull
Able Trades
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Reviewed in January 2025
I had Big Wave Plumbing & Gas help get my water heater up to code, and they were fantastic to work with. They were quick, professional, and clearly explained everything that needed to be done. The Big Wave team was efficient, and the job was done right. I will only be using them from here on...
Big Wave Plumbing & Gas, LLC
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Reviewed in February 2024
Northeast heating and cooling was Great to work with and got the job done in a timely fashion and at a great price
NorthEast Heating and Cooling
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Reviewed in December 2023
Joe and his crew were very respectful of my home and they were able repair my heat pump when 2 other companies said that the entire system needed to be replaced. Thank You Comfort Air!
Comfort Air Systems
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Reviewed in October 2023
Derek was prompt, professional, and was able to also service my furnace in addition to the heat pumps. I would most definitely recommend him and will use him again in the future.
D & M Heating
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Reviewed in October 2023
It went very well. Ryan is very knowledgeable and was able to resolve my furnace issue. I will recommend HVAC Solutions 207, LLC for your heating and furnace issues anytime
B&P Handyman Services
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Reviewed in October 2023
My furnace issue was resolved accurately well. I will recommend this company for your heating and air conditioner problems anytime.
HVAC Solutions 207, LLC
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Reviewed in May 2023
Heat pump works great, install went smooth.
Russell's HVAC
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Find Heating and air conditioning pros in Sumner

Northwoods HVAC

5.0(

)

Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Repair or Service+10 more

Serving Sumner, 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."

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Upfront Home Inspection, LLC

4.9(

)

Air Ducts & Vents - Clean

Serving Sumner, ME and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I would highly recommend Upfront Home Inspection, LLC, happy with their work and professional. good job!"

Response time12 hrs

35 neighbors recently requested a quote

Recommended by86%of homeowners

Ductless Mini-split A/C - Install or ReplaceDuctless Mini-split Heating System - Install or ReplaceHeat Pump - Install or Replace+1 more

Serving Sumner, ME and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"Incredibly professional, always happy to answer questions. Unlike other places that install and you never hear from again, Cam, David, and crew make sure your heat pump stays in tip top shape with yearly cleanings. They even offered to clean a unit that another contractor put in a year prior who refused to come clean it. I got quotes from over 8 different companies for my second heat pump, and Heat Pumps of Maine were a clear step above the rest."

Response time1 day

Recommended by85%of homeowners

Heat Pump - Install or Replace

Serving Sumner, ME and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"It was late at night when we realized our water heater blew and flooded our basement like a swimming pool. We had to find a plumber and fast. we came across SWB he was out here within 30 minutes from our call the job he did was impeccable. He went above and beyond he went and got us a new water heater, installed it, and then stuck around to help us clean up, Since then we’ve used him for several other projects. Every time the professionalism came with him I would highly recommend him 100%."

New condensate line property piped into existing house sewer to code

Install condensate pump and neutralizer to bring existing boiler upto code.

1 1/2” water mains insulated after we installed them.

+10

Response time1 day

Response rate100%

27 neighbors recently requested a quote

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LaPlante Electric, Inc.

4.2(

)

Heat Pump - Install or ReplaceHeat Pump - Install or Replace - For Business

Serving Sumner, ME and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"Techs were very nice. Took time to put mats down on my carpets to keep them clean. Explained how to operate the heat pump and gave suggestions on how to make it function most efficiently. Everything was cleaned up before they left, they even vacuumed! So glad I went with LaPlante for my heat pump! Bev"

Response time3 days

Response rate90%

40 neighbors recently requested a quote

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CAL Plumbing & HVAC LLC

5.0(

)

Electric Furnace / Forced Air Heating System - RepairElectric Furnace / Forced Air Heating System - Repair - For BusinessHeat Pump - Repair or Service+1 more

Serving Sumner, ME and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"Caed did a shower replacement for me. It came out really nice and he’s a very nice guy! Highly recommend"

+14

2 neighbors recently requested a quote

Heat Pump - Install or Replace

Serving Sumner, ME and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Nat did a fantastic job. He is the best."

Response time3 hrs

Response rate96%

1 neighbors recently requested a quote

Ductless Mini-split A/C - Install or ReplaceHeat Pump - Install or Replace

Serving Sumner, ME and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"They were super helpful and the staff was so nice I recommend Able Trades to everyone they installed 2 heat pumps in my home and they are amazing iam so thankfull"

Response time1 day

Response rate100%

3 neighbors recently requested a quote

Heat Pump - Install or Replace

Serving Sumner, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Small jobs welcome

"I could not ask for a better electrician than Noah Parker. He has come through for me big-time on more than one occasion. Noah installed my generator & showed me how to use it; diligently diagnosed & fixed complex electrical problems in my older mobile home; & even fixed my lawnmower! Not only is Noah an expert at his craft. He is utterly kind, patient, trustworthy, fair, & decent. As a clueless first-time homeowner, I am SO grateful for Noah. I highly recommend him."

Response time9 hrs

Response rate93%

8 neighbors recently requested a quote

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Maine Way Heating and Cooling LLC

5.0(

)

Oil Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - Install+8 more

Serving Sumner, ME and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Excellent Service! Maintained constant contact until the day of parts were in. I had been given quotes from other contractors but Brady was great to work with and could fix my problems byreplacing parts and rebuilding my boiler. Definitely would recommend to anyone about call him for work to be done. Thank you!"

13 neighbors recently requested a quote

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Showing 1-10 of 91

Heating and Air Conditioning questions, answered by experts

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

Yes, through thorough cleaning and inspection, optimizing functionality, and reducing energy use.

On average, replacing an AC compressor costs between $800 and $2,300, but it could cost as much as $2,800. There are a few factors that impact the price of a compressor replacement, including the type and size of the compressor, as well as the type of HVAC system and local labor rates.

Most HVAC service calls include diagnostic fees, which could include checking on a specific issue you’re experiencing or running through a routine inspection checklist. If you called for a particular problem, the service call will also include an estimate to fix the issue, including materials and labor. Depending on your HVAC technician and the service you requested, you might also get a general inspection of your system components to ensure everything is working as intended.

Mold in your air conditioner isn't a good thing, as it can be harmful to your health. If the mold travels through the ductwork or is blown out of the A/C, you and your family can inhale mold spores and develop respiratory illnesses and other problems. Preventing mold from growing in the air conditioner will help protect your health.

The Sumner, ME 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.

See all articles

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•
Jul 9, 2026Jul 9, 2026
Can You Add Central Air to a Baseboard-Heated House?
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12 Air Conditioning Tips for the Summer
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•
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•
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Heat Pump vs. Air Conditioner: What’s the Difference?
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•
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Pros and Cons of Air-Source Heat Pumps
Air-source heat pumps are an energy-efficient way to heat and cool your home. Learn the pros and cons of this heating method.
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•
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How to Retrofit Air Conditioning in Your Home (Even When You Think It’s Not Possible)
Retrofitting your house for AC is, surprisingly, not too hard. Here’s what you’ll need to consider to make it happen.