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Top-Rated Air conditioning pros in Oneco - Updated Nov 2026

Avatar for Phalan Construction & The Handyman
Phalan Construction & The Handyman
4.8(
353
)
Window A/C Unit - InstallWindow A/C Unit - Install - For Business

Serving Oneco, CT and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Emergency services offered

Warranties offered

"Bob did a fantastic job venting the microwave. I messaged him on his website, along with pictures of the microwave and how I wanted to connect to an existing vent and he said he could do what I wanted and could start in approximately two weeks. A few days before he could start, he emailed me to let me know that he'll be able start in a couple of days. He arrived on time and we went over what needed to be done and he got to work. He ran into a hiccup because of return HVAC vent behind the wall but he provided a couple of solutions to it and it turned out great. He finished quicker than he originally estimated and everything was left in pristine condition afterwards."
Additional Photos
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Recent Basement Alteration
2
Recent Bathroom

+33

1 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for ASL Mechanical Services LLC
ASL Mechanical Services LLC
5.0(
1
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+1 more

Serving Oneco, CT and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Welcome to ASL Mechanical Services LLC! We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you! \n

Gallery
Gallery
Gallery
Gallery
Condenser

+14

23 neighbors recently requested a quote
Avatar for NEW ENGLAND SMART ENERGY
NEW ENGLAND SMART ENERGY
4.9(
13
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+14 more

Serving Oneco, CT and surrounding areas

In business since 2009

Emergency services offered

"I could not be more pleased with this company or this service. I found them here on AL and with a rebate, it was a great deal. When I called, the woman who answered was extremely polite and helpful and took the time to go over the entire audit process with me (she wasn't rushed as some receptionists are). They sent an email to confirm the date and time.
When the team arrived, they were on time and each of them introduced themselves by name to me before coming into my house. They were all very polite and courteous. The leader (I can't remember his name) gave me an overview of the process and explained things as they went. Basically, they simulate high winds around the house and then monitor for where leaks are. My house is relatively new and has no basement, so it was already pretty efficient, but there were some major leaks by the front door and attic door, which they sealed on the spot. They also showed me that I could hold my hand over any electrical socket, even ones on interior walls, and feel the "wind"--which means air was leaking out those! So I plugged them all with those little socket protectors. The guys also took me into the attic and showed me some leaks, and fixed them--and fixed the attic door by adding a little latch to help it stay closed. All in all, they reduced the amount of air getting into my house by 500 (I forget the units). It was clear they didn't just make up this number--they showed me the number after the first test and then after the second test (when they had treated the problem areas).
I also got a few free CFLs and LEDs, and bought 3 more LEDs since they were at a great price. They left some rebates with me, although all my appliances are new so I didn't need anything. 
When they left, they each said goodbye and were very professional until the end. They were respectful in my home and asked before opening any closets or doors, etc. I felt very safe with them here, which is not always the case when people are in your home working. I think the price is a fantastic one, especially with the AL rebate that was on when I scheduled. I feel I got my money's worth. My husband and I had tried to plug some leaks ourselves, but we didn't really know what we were doing and we had no way to measure if we were really helping anything. This audit gave me hard numbers to look at and I was impressed that they did the fixes on-site (included in the price--for instance, they plugged a whole around my front door frame by installing a clear plastic barrier). It was a great deal and a great experience. Highly recommend!
Bonus--when we resell this house in a few years, I will definitely list that we got a professional energy audit performed on it and that it's very efficient. Definitely a selling point!
"
Additional Photos
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NESEG Certified Techs
Blower Door Test

+38

Recommended by91%of homeowners
Avatar for Northern Lights Electric Inc
Northern Lights Electric Inc
4.7(
1,125
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Oneco, CT and surrounding areas

In business since 1999

Free estimates

Credit card accepted

"Great company to deal with. Provided a detailed quotation, worked diligently to schedule the job quickly, electricians arrived on time and completed the installation seamlessly, as two of the outlets were a bit tricky to access. Would hire them again without reservation."
EV Charger
Portable Generator
Outdoor Lighting
Ceiling Fans
Multi-Family Service Upgrade

+23

Recommended by93%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Oneco, CT and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Excellent service which provided outstanding results.  Computer was running so slow my wife wanted me to buy another computer.  Using Angies List I was able to find this company who I called right away.  I made arrangements to drop off my laptop on Friday night and was able to pick it back up Sunday afternoon.  Took it home and it runs just like the day i bought it.  James loaded virus protection software which works better than the software I bought.  Very goodexperience, i will use him again.
"
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Avatar for Sears Heating and Cooling - Hartford
Sears Heating and Cooling - Hartford
3.8(
41
)
Central A/C - InstallCentral Humidifier - Install or ReplaceDuctless Mini-split A/C - Install or Replace+1 more

Serving Oneco, CT and surrounding areas

In business since 1893

Free estimates

Warranties offered

"Sears may have a good product, but I was very uncomfortable with the guy they sent out to give a "quote". It isn't a quote, it's a sales pitch and it ate up over 2 hours of our time! The salesman was very nice and seemed like a good guy, but he was overselling sears and putting down ind. contractors and it put me off. Aside form that, their quote was 2/3 higher than anywhere else. $23,000 for central air just wasn't worth it for us."
Recommended by78%of homeowners
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FAQs for air conditioning projects in Oneco, CT

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 Oneco, CT homeowners’ guide to air conditioning services

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