K.N. Heating and Cooling, proudly services consumers since 2009. With over 15 years of experience in the HVAC, our attention to detail and professionalism guarantees customer satisfaction. Our mission is to create long lasting relationships with all our customers. We offer 24 hour service in case of emergency. Call today for a free estimate! NASSAU COUNTRY LICENSE # H3642240000
"Our boiler stopped working. When I consulted Angis list Kevin was the first to response and by his reviews I chose him. He was quick to answer and quick to come to our house. Price is very fair and I will definitely keep using him going forward with our boiler issues"
Vera O on March 2025
K.N. Heating and Cooling, proudly services consumers since 2009. With over 15 years of experience in the HVAC, our attention to detail and professionalism guarantees customer satisfaction. Our mission is to create long lasting relationships with all our customers. We offer 24 hour service in case of emergency. Call today for a free estimate! NASSAU COUNTRY LICENSE # H3642240000
"Our boiler stopped working. When I consulted Angis list Kevin was the first to response and by his reviews I chose him. He was quick to answer and quick to come to our house. Price is very fair and I will definitely keep using him going forward with our boiler issues"
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."
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 "
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!"
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'"
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"
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!"
With over 30 years of experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.
"Very professional. He assessed the problem then explained to me the cost and we went ahead and he fixed in all in a few hours. Very satisfied"
Darlene W on July 2025
With over 30 years of experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.
"Very professional. He assessed the problem then explained to me the cost and we went ahead and he fixed in all in a few hours. Very satisfied"
HM Construction Group specializes in home remodeling, construction, property management, handyman tasks and repairs. We do all residential and commercial contracting, from trim to odd jobs. No job is too small or too big. We're a locally owned and operated company with many years of construction and handyman experience. We value honesty and integrity in all aspects of our business. We specialize in handyman work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall.
I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
Virginia K on October 2025
HM Construction Group specializes in home remodeling, construction, property management, handyman tasks and repairs. We do all residential and commercial contracting, from trim to odd jobs. No job is too small or too big. We're a locally owned and operated company with many years of construction and handyman experience. We value honesty and integrity in all aspects of our business. We specialize in handyman work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall.
I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
Virginia K on October 2025
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Heating and Air Conditioning questions, answered by experts
You can buy a house with a 15-year-old HVAC system if you inspect the system for performance and budget for a replacement within the next three years. You can also negotiate the price with the sellers. Ask to look at the unit’s maintenance records and energy bills for the last two years to determine the shape of the HVAC system and its operating costs. Spend time in each room of the house to gauge if the HVAC keeps the home at a consistent temperature throughout.
AC capacitors last between five and 15 years, with an average lifespan of 10 years. Most people only need to replace a capacitor once during an AC unit’s lifetime. You don’t need to replace the capacitor unless something is wrong with it, which an HVAC repair pro can diagnose.
Some HVAC systems tend to use R410A refrigerant, although if you have an older model it may be using R22. R22 is banned due to its harmful environmental and health impacts, and it is a sign that your AC unit is old enough to consider a replacement and the significant efficiency gains that could come with it.
When an evaporator coil becomes faulty, it can result in various problems within your HVAC system. These problems could include reduced cooling or heating capabilities due to ice formation and obstructed airflow, along with increased energy consumption and higher bills. Additionally, a damaged coil may lead to refrigerant leaks, which are environmentally harmful and decrease overall system efficiency.
Ultimately, if not addressed right away, a bad evaporator coil can even lead to a complete failure of your HVAC system. That’s why timely repair or replacement is crucial to maintaining your family’s comfort and your HVAC’s efficiency.
You should service your AC at least once per year, in the spring, and twice per year if your unit is 10 years or older. As your unit ages, more maintenance can catch problems early and help the system reach its full lifespan potential, usually 15 years.
Get on your HVAC technician’s schedule in early spring so your unit is ready to go for the season. If you’re doing two inspections per year, aim for one in the spring and one in the fall. You should also service your furnace once per year in the fall.
The Islip, 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.
If your furnace is malfunctioning, it could be a faulty control board. Find out what a furnace control board replacement costs for parts, labor, and more.
If your air conditioning unit isn’t functioning properly, you might need an AC recharge. Our guide will detail what a typical AC recharge cost looks like.
Here's what you can expect when getting an estimate for coolant leak repair costs. The cost can vary based on the detection method used, the source of the leak, and the amount of damage that needs to be repaired in the aftermath.