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Find Air conditioning pros in Ronkonkoma

Avatar for Elm Air Conditioning Corp
Elm Air Conditioning Corp
4.4(
81
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 1952

Free estimates

Warranties offered

"As a Full-Service Contractor and Residential Builder in Nassau County, we at HOMEREDI have relied on the Expert Team of Technicians and Installers from ELM Air Conditioning in Freeport Long Island for all of our discerning Clients HVAC requirements. The entire staff from the Operating Owners to every individual member are always willing to push the envelope forward when it comes to meeting our deadlines and delivering a superb product in a timely fashion. Not only we team up with ELM but we also capitalize on their vast reach and knowledge for our own residential air conditioning Service installation and continued maintenance Service. We highly recommend ELM Air conditioning not only to our Clients but to our Neighbors across the Island."
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16 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Legend Air
Legend Air
5.0(
11
)

Serving Ronkonkoma, NY and surrounding areas

Approved

Free estimates

Offers commercial services

"Chris was Very professional and showed up on time. Explained everything clearly and honestly. Fixed the air-conditioning quickly and it?s working great now! His pricing was very reasonable!??????????"
Ductless deep cleaning
Ductless deep cleaning
Ductless deep cleaning
Ductless deep cleaning
Ductless deep cleaning

+23

Avatar for Comfort Ductwork Systems, Inc.
Comfort Ductwork Systems, Inc.
4.9(
73
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Jonathan and Crew did an outstanding job on my new Ductless air conditioning system. Great Price, Professional all the way and nice cleanup when done. Answered all my questions and I as their for the whole job. Highly recommend."
Condensing Boiler & Indirect Hot Water Heater
Central HVAC
Oil Fired Boiler & Indirect Hot Water Heater
New Install
Thermostat Control

+2

Response time11 hrs
33 neighbors recently requested a quote
Recommended by94%of homeowners
Country Wide Heating & Air Conditioning Corp.
3.9(
10
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"The owner showed up on the planned afternoon appointment day and called 20 minutes before arrival. He quickly assessed the problem with my air conditioner. Despite spending over two hours working in my attic, the price he charged was very reasonable and lower than what I anticipated. If I have any future air conditioner problems I will definitely call this owner/company."
Recommended by100%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.6(
68
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"We were desperate to find someone to repair our central air conditioning unit. We were not able to move into the house and everyone that we called was not able to accommodate us because of the recent heat wave. All Weather was able to get a technician to us within 2 days. Nuri was amazing and showed my husband how everything worked and what repairs needed to be done. By the time he left, we had a cool house and were able to set up our movers. Thanks to Angie’s list, I found a reputable company that was reliable and efficient. We can rest easy! Thank you!!!"
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+13

Response time3 days
10 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Surefire Mechanical Corporation
Surefire Mechanical Corporation
4.5(
157
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Called on a Sunday evening and there was a serviceman at my door by 8 AM Monday morning. Mike, the serviceman, was extremely knowledgeable, professional and courteous. Will recommend this company to anyone I know who needs air conditioning or servicing. Thanks again for the speedy service and knowledgeable serviceman who repaired the air conditioner quickly!"
4 Zone Navien Boiler
1st Floor AC System
Hi Efficient Heat and Hot Water
Snow melt sensor
Manifold

+14

Response time10 mins
Recommended by97%of homeowners
Avatar for JB Comfort Heat and Air Conditions
JB Comfort Heat and Air Conditions
4.6(
50
)

Serving Ronkonkoma, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"The installation of a new split unit Air conditioner unit was done by Joe. He installed the unit, ran the electrical work to my panel, installed all the lines needed. Joe completed the project with the expertise needed and was sure to address all the indoor and outdoor cosmetic piping and ductwork with a great appearance to meet my expectations. Joe was on time, very attentive to all my questions, emails and text messages and the price was very reasonable. I highly recommend using Joe for your AC unit installation and I will be calling him again for any future projects that I may have! 😊"
Condenser cleaning
Condenser cleaning
Additional Photos
Additional Photos
Additional Photos

+11

Response time9 hrs
4 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Home+ Air and Heat
Home+ Air and Heat
4.8(
13
)

Serving Ronkonkoma, NY and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Excellent service! The team arrived right on time and did a fantastic job getting my furnace back up and running. Their pricing was very fair and transparent—I highly recommend them for any HVAC repairs."
Response time1 day
4 neighbors recently requested a quote
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Showing 1-10 of 613

FAQs for air conditioning projects in Ronkonkoma, NY

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Ronkonkoma, NY homeowners’ guide to air conditioning services

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