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TRUSTED BY NESCONSET, NY HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon228
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Nesconset

"Cole was great - punctual, reasonably priced, professional and personable. Did a very excellent job in our home. Would highly recommend!"

Jeanette F on October 2025

About 16 years

"Cole was great - punctual, reasonably priced, professional and personable. Did a very excellent job in our home. Would highly recommend!"

Jeanette F on October 2025


Avatar for DZ Electrical Contracting

DZ Electrical Contracting

4.85(
411
)
Approved Pro

DZ Electrical Contracting

4.85(
411
)
Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
33 years of experience

Here at DZ Electrical Contracting, we perform complete residential, commercial services of any kind, from basic repairs, trouble shooting, to custom requests. We do repairs, upgrades and installations of all types and sizes. We are always on time and on budget, trust the people who think of your needs first every time. We're here to solve problems, not create them. Give us a call today!

"ewewaewaewa"

Dom M on October 2024

Here at DZ Electrical Contracting, we perform complete residential, commercial services of any kind, from basic repairs, trouble shooting, to custom requests. We do repairs, upgrades and installations of all types and sizes. We are always on time and on budget, trust the people who think of your needs first every time. We're here to solve problems, not create them. Give us a call today!

"ewewaewaewa"

Dom M on October 2024


Just Rite Heating and Cooling

4.93(
122
)
Approved Pro

Just Rite Heating and Cooling

4.93(
122
)
Approved Pro
Customers say: Quick response
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers
30 years of experience

We�re dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"I am not a review writer at all, however, I felt it only fair to write a review for Eric and Just Rite HVAC after a wonderful experience. This company and Eric the owner are, in a word, the BEST! I needed main floorâ s central AC replaced. A friend recommended me to Eric. I texted him and he responded with a few hours. setting up an appointment was fast and easy. Eric was knowledgeable and timely. My job was extremely difficult based on the location of my air handler and there was a high chance the ceiling would need to be opened for access. When Eric arrived for the job he inspected further and said he was going to try not to have to open the ceiling for access. He and his crew went well beyond what anybody else would have done and meticulously dismantled the old air handler piece by piece. It was time consuming, difficult and energy consuming. But they were able to do and saved me from having a gaping hole in my ceiling. They did an excellent job setting up the new air handler in the same location and even fixed errors the previous installer had made! The entire crew were highly professional, courteous and clean. They put down drop cloths everywhere and cleaned up everything when they were done. I highly, highly, and without reservation, recommend Eric and Just Rite HVAC and will tell anybody I know about them."

Anne D on July 2024

We�re dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"I am not a review writer at all, however, I felt it only fair to write a review for Eric and Just Rite HVAC after a wonderful experience. This company and Eric the owner are, in a word, the BEST! I needed main floorâ s central AC replaced. A friend recommended me to Eric. I texted him and he responded with a few hours. setting up an appointment was fast and easy. Eric was knowledgeable and timely. My job was extremely difficult based on the location of my air handler and there was a high chance the ceiling would need to be opened for access. When Eric arrived for the job he inspected further and said he was going to try not to have to open the ceiling for access. He and his crew went well beyond what anybody else would have done and meticulously dismantled the old air handler piece by piece. It was time consuming, difficult and energy consuming. But they were able to do and saved me from having a gaping hole in my ceiling. They did an excellent job setting up the new air handler in the same location and even fixed errors the previous installer had made! The entire crew were highly professional, courteous and clean. They put down drop cloths everywhere and cleaned up everything when they were done. I highly, highly, and without reservation, recommend Eric and Just Rite HVAC and will tell anybody I know about them."

Anne D on July 2024


Avatar for Comfort Ductwork Systems, Inc.

Comfort Ductwork Systems, Inc.

4.97(
67
)
Approved Pro

Comfort Ductwork Systems, Inc.

4.97(
67
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
20 years of experience

Contact us for all of your heating and air conditioning installs or replacements. We also do install and repair of boilers and furnaces. We service all of Suffolk and Nassau counties. We are a member of the Better Business Bureau, EPA certified, and a member of PSEGLI Cool Homes Contractors.

"We just got a new AC unit and oil furnace installed. We couldn’t be happier ! They were very professional from the start. They were so good with all the details and took away our old units , very clean and organized and super nice guys. I already gave my family his info so they will be calling them in the future. The owner makes us his priority and does everything from start to finish. Gave us a great price and wonderful dealing with them. If we ever need anything in the future we will certainly call them. I highly recommend them. Nanci & franco "

franco f on July 2025

Contact us for all of your heating and air conditioning installs or replacements. We also do install and repair of boilers and furnaces. We service all of Suffolk and Nassau counties. We are a member of the Better Business Bureau, EPA certified, and a member of PSEGLI Cool Homes Contractors.

"We just got a new AC unit and oil furnace installed. We couldn’t be happier ! They were very professional from the start. They were so good with all the details and took away our old units , very clean and organized and super nice guys. I already gave my family his info so they will be calling them in the future. The owner makes us his priority and does everything from start to finish. Gave us a great price and wonderful dealing with them. If we ever need anything in the future we will certainly call them. I highly recommend them. Nanci & franco "

franco f on July 2025


"They were on time, very efficient and did the work as expected "

robert B on November 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.

"They were on time, very efficient and did the work as expected "

robert B on November 2025


Rizzo Heating & Cooling, Inc.

4.87(
82
)
Approved Pro

Rizzo Heating & Cooling, Inc.

4.87(
82
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Ii found them to be reliable, experienced in all my plumbing needs. Always returns calls. Found to be fair. Would hire again when needed."

J l on February 2024

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Ii found them to be reliable, experienced in all my plumbing needs. Always returns calls. Found to be fair. Would hire again when needed."

J l on February 2024


Avatar for MassAir

MassAir

4.90(
62
)
Approved Pro

MassAir

4.90(
62
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
18 years of experience

With over 30 years industry experience we are dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. As the owner I personally design and install each system with my experienced employees. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction. FREE estimates. Licensed and Insured. FINANCING available.

"We had an ac unit put in two years ago. It never worked quite right. He came to check situation a couple times last summer - being it was a new unit - said to leave on auto/70 and should be fine. Still would not work correctly, hot days wouldn't work at all. This year was not working at all, only HOT air would come out. Once again came this summer, added more freon, stating there must be a leak somewhere. They couldn't find leak, told us we need to replace all the copper piping to fix the not even found leak. Wanted to charge insane amount money to fix a recent unit they installed that never worked in the first place! I tried calling the business a few times with not a single call back to speak with me. Thankfully i was forced to get it checked by someone else - it was an EASY fix! The flares were never tightened and there was a welded area that we were never told was done in first place. Do not trust this place; horrible customer service, unreliable, and afraid i was almost scammed!"

Emily O on June 2025

With over 30 years industry experience we are dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. As the owner I personally design and install each system with my experienced employees. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction. FREE estimates. Licensed and Insured. FINANCING available.

"We had an ac unit put in two years ago. It never worked quite right. He came to check situation a couple times last summer - being it was a new unit - said to leave on auto/70 and should be fine. Still would not work correctly, hot days wouldn't work at all. This year was not working at all, only HOT air would come out. Once again came this summer, added more freon, stating there must be a leak somewhere. They couldn't find leak, told us we need to replace all the copper piping to fix the not even found leak. Wanted to charge insane amount money to fix a recent unit they installed that never worked in the first place! I tried calling the business a few times with not a single call back to speak with me. Thankfully i was forced to get it checked by someone else - it was an EASY fix! The flares were never tightened and there was a welded area that we were never told was done in first place. Do not trust this place; horrible customer service, unreliable, and afraid i was almost scammed!"

Emily O on June 2025


Avatar for AR AIR CORP

AR AIR CORP

5.00(
51
)
Approved Pro

AR AIR CORP

5.00(
51
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
26 years of experience

AR Air has been proudly serving our community since 1999, providing top-quality heating, cooling, and appliance services. We specialize in AC, heating, and water heater solutions, and we’re a Fujitsu Elite contractor for ductless systems. Our expertise also includes rooftop package units, PTAC units, humidifiers, and WiFi thermostats, along with repairs and maintenance on all refrigeration systems.

"great service.excellent and timely work completed by a professional service manager'"

Charles I on November 2025

AR Air has been proudly serving our community since 1999, providing top-quality heating, cooling, and appliance services. We specialize in AC, heating, and water heater solutions, and we’re a Fujitsu Elite contractor for ductless systems. Our expertise also includes rooftop package units, PTAC units, humidifiers, and WiFi thermostats, along with repairs and maintenance on all refrigeration systems.

"great service.excellent and timely work completed by a professional service manager'"

Charles I on November 2025


Avatar for MSD Heating & Cooling

MSD Heating & Cooling

4.92(
60
)
Approved Pro

MSD Heating & Cooling

4.92(
60
)
Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
23 years of experience

NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!

"Reasonable price great work friendly and very clean staff"

Huseyin a on May 2022

NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!

"Reasonable price great work friendly and very clean staff"

Huseyin a on May 2022


Allined Mechanical

4.92(
74
)
Approved Pro

Allined Mechanical

4.92(
74
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
5 years of experience

Allined Mechanical, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!

"Competent, professional, expert service. They did a very thorough, neat job in repairing my unit. Replaced what was necessary and cleaned up. Plus, they kept me in the loop the whole time. Very transparent, very fair, straight forward people. I highly recommend them—plus, they contacted me the next day after the job they did for us to make sure all was well!"

Dean P on August 2025

Allined Mechanical, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!

"Competent, professional, expert service. They did a very thorough, neat job in repairing my unit. Replaced what was necessary and cleaned up. Plus, they kept me in the loop the whole time. Very transparent, very fair, straight forward people. I highly recommend them—plus, they contacted me the next day after the job they did for us to make sure all was well!"

Dean P on August 2025

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Heating and Air Conditioning questions, answered by experts

You may be able to clean mold from your air conditioner in some cases. If the mold growth only takes up a small area, you can use either vinegar or bleach mixed with water to remove it. Larger areas of mold should be left to the professionals, though. It's also a good idea to leave mold removal to the pros if you are sensitive to mold or have asthma. 

One of the first signs of mold in an air conditioner is a musty smell. You're likely to notice the smell when the unit runs, from the air coming out of the vents or the unit itself. You may also be able to see mold growing on the unit, such as near the condenser coils or by the fan. In some cases, there may be visible mold by the vents.

No, you should not run an air conditioner with a Freon leak. If you think your AC unit is leaking refrigerant, shut it off immediately. When you keep using a leaky air conditioner, it could damage the unit and release more refrigerant. After turning off the AC, have an HVAC pro come take a look at the unit.

While it's generally safe to stay in a home with a coolant leak if your home is properly ventilated, it's important to have a professional come out to assess the situation right away. You should evacuate your home if you notice any powerful fumes. Additionally, you should leave your home if you are experiencing headaches or dizziness.

Yes. It's not just AC filters that get dirty. Ducts can accumulate dust and dirt quickly. Insects and animals can also get into duct systems, creating many problems. Dirt build-up and unwanted guests can constrict the airflow and cause rooms not to cool evenly. You might also see higher energy bills because they're not working as efficiently.

The Nesconset, NY 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.

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