
Serving Willimantic, CT and surrounding areas
Approved
In business since 2007
Free estimates
Warranties offered
"some difficulty scheduling because of both our summer schedules but over all good job"




Serving Willimantic, CT and surrounding areas
Approved
In business since 2007
Free estimates
Warranties offered
"some difficulty scheduling because of both our summer schedules but over all good job"



Serving Willimantic, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2000
Free estimates
Emergency services offered
"They were excellent. They mounted out tv above our fireplace. It looks great. They were professional, fast and affordable."





+232

Serving Willimantic, CT and surrounding areas
Approved
In business since 2001
Free estimates
Warranties offered
"On time, professional, easy to work with, willing to trouble-shoot and think outside the box to determine the cause of the furnace problem. Had suggestions for further upkeep and service, should the time come. Replaced parts that should have been changed and/or replaced and cleaned by former company, but were neglected for the last three years. Was reassuring that the entire furnace did not need to be replaced!"
Serving Willimantic, CT and surrounding areas
Approved
In business since 2009
Free estimates
Warranties offered
NEFTCO Mechanical Heating and Cooling is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 15 years of experience serving Connecticut and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!





+10

Serving Willimantic, 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





+14

Serving Willimantic, CT and surrounding areas
In business since 2004
Free estimates
Emergency services offered
"The guys were on time, cheerful, thorough, and and got the job done. They were thoughtful about my cat, too. The 'sanitization' stuff they sprayed did smell for a few days, despite my airing out the house with the windows open, but it did eventually go away. And they must have gotten a lot of dust out because my children (who are usually very sneezy with the dust pumping through our house) have seemed much better since the ducts got cleaned. Very happy with the service. I used an Angie's List "deal" for the service--I was in a hurry to get it done (my kids had dropped some art supplies down a vent that were making clicking noised that were driving me nuts) so I didn't compare prices at all, I just looked for a company that seemed thorough and they they were. And the clicking sounds of rogue art supplies is gone. Yay!"





+43

Serving Willimantic, CT and surrounding areas
In business since 1996
Free estimates
Emergency services offered
"THEY ARE ALWAYS VERY KIND TO ME AND THEY ALWAYS GET THE JOB DONE VERY FAST. THEY ARE ALSO VERY NEAT ABOUT CLEANING UP ANY MESS THAT THEY MAY MAKE. THEY DO A FANTASTIC JOB COMING OVER AND CLEANING MY AIR DUCTS."





Serving Willimantic, CT and surrounding areas
In business since 2000
Free estimates
Credit card accepted
"Excellent job, professional, considerate of my time. I already notice less dust bunnies due to my cleaner air.
"

Serving Willimantic, CT and surrounding areas
In business since 1995
Free estimates
Emergency services offered
"Had a great experience with the 2 guys that came. One looked after the air conditioning system and the other the furnace and thermostat. found them to be knowledgeable, personably, and professional in there dealings."





+22

Serving Willimantic, 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!
"





+38
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.
From average costs to expert advice, get all the answers you need to get your job done.

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