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Find Air conditioning pros in Lexington

Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Central A/C - Install - For BusinessCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business+11 more

Serving Lexington, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"I whole heartedly recommend Airco. Their team was experienced, skillful, friendly and professional throughout the duration of this job, from Joe's first visit to my home to discuss air conditioning options to Derek and Cam's final touches on the duct system. I had complete confidence in them, as well as in Steve, Danny, Frank and Patrick. Additionally, Airco's connections to MassSave and Commerce Bank meant financing and payment options to suit my budget. No more hauling loud and heavy window a.c. units up from the basement. Instead, I am enjoying consistent cooling throughout my home with no noise whatsoever. I am a very happy customer!"
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+4

Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Lexington, MA and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Excellent. I've had Genove install both gas and oil heating systems in my properties, most recently oil. They have also installed central air/hydro air and handle my oil delivery. The techs have always been polite & knowledgable. Their customer service is impeccable. As a landlord/home owner, I couldn't be happier with them handling all my HVAC needs and would recommend them to anyone."
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Pics
Pics

+2

Response time12 hrs
Response rate100%
11 neighbors recently requested a quote
Avatar for Ace Hardware Home Services
Ace Hardware Home Services
4.5(
53
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Lexington, MA and surrounding areas

Approved (Corporate)

In business since 1967

Free estimates

Emergency services offered

"Diagnosis and repair were straightforward and the talented Mike, who has done other great work for us on our ACs, had a replacement pump in his truck. Swapped over in under an hour. Cost of the repair was quite high, mainly due to very high price they charged for the pump. A Taco pump that I could buy for $175 was priced on this repair at more than $500. I get that it was an urgent situation and I’m happy to pay reasonably for the response but that mark-up bothered me. I called the office, had a long talk with the owner; sadly, she offered no consideration at all. Yes, it’s hard to find and keep skilled techs, but now seems that most HVAC firms have a business model like a car dealer’s service dept, far more corporate, less flexible or customer-considerate."
Heat Pump
Mitsubishi Hyper Heat
Multiple Ductless Heat Pump Installation
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+6

Response time1 day
Response rate100%
4 neighbors recently requested a quote
Avatar for Morris Heating & Air Conditioning
Morris Heating & Air Conditioning
4.8(
81
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Lexington, MA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Morris Heating and Air Conditioning staff quickly worked me into their schedule even though I was not a current customer. Service Pro Christos called when he was in route. He walked me through his troubleshooting and diagnosed incorrect wiring left by another HVAC service technician during furnace work in the winter. Problem resolved in 10 minutes. I am a Morris Heating and Air Conditioning customer now."
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+8

5 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Druziako HVAC Inc
Druziako HVAC Inc
4.7(
157
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral Air Cleaner - Install or Replace+1 more

Serving Lexington, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I got central air installed in my 100+ year old house that I was convinced could never actually have central air. Despite the weird shape of the house and not a lot of extra space to work with, Druziako figured out a way to get it installed. They was fantastic from the initial estimate appointment through finishing installation. Everyone is extremely friendly and you can tell it is a family owned business. The price was extremely reasonable and everything got done quickly. It took a couple of extra days beyond the original plan but that was only to make sure it all got done correctly and to figure out how to work out a few problems (again with the old house). Great communication including after the fact to help us get rebates and warranties set up. 100% recommend."
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
13 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Total Comfort Mechanical Inc
Total Comfort Mechanical Inc
4.9(
225
)
Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Install or Replace+4 more

Serving Lexington, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Free estimates

Emergency services offered

"Five Star Service! Total Comfort Mechanical planned, designed, and installed a Mitsubishi Intelli-Heat system at our home in Melrose. They seamlessly combined our existing gas furnace and ducted system with an efficient Mitsubishi heat pump to create a hybrid heating and AC system. The team exceeded our expectations. They are honest, respectful, and always maintained a positive and professional attitude. They did everything they said they would do and even went above and beyond. The technicians are skilled and dedicated, often working long hours to ensure the job was done right. We were impressed by their commitment to keeping our work sites clean at the end of each day. The planning was meticulous, the communication was excellent, and the final delivery exceeded our expectations. We can confidently recommend Total Comfort Mechanical for any heating and air conditioning projects. Thank you, Wendell and team, for making our home more comfortable and efficient!"
Service Truck
Cambridge Heat Pump Installation
Billerica Mitsubishi Ductless Installation
Response time10 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Dodge Cooling & Heating, Inc.
Dodge Cooling & Heating, Inc.
4.9(
51
)
Central A/C - Service or Repair

Serving Lexington, MA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I would highly recommend Dodge Cooling and Heating. They did a Spring tune up on my central air conditioning system and were extremely responsive, prompt, professional and knowledgeable. I will definitely use them for any future heating and A/C needs that I may have."
Duct Cleaning
Duct Work
Duct Work
Dryer Vent Cleaning
Dryer Vent

+4

Response time11 hrs
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Peter Paone HVAC
Peter Paone HVAC
4.9(
24
)
Central A/C - Service or RepairCentral Air Cleaner - Install or ReplaceCentral Air Cleaner - Repair or Service+3 more

Serving Lexington, MA and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"Peter did an excellent job tuning up my A/C system. He was extremely diligent in making sure my A/C unit was up to speed for cooling for the upcoming summer weather. I know I will most likely need a new system installed in the near future as this one is on it's last legs. I know who to call when I need a new A/C unit installed and it will be Peter!"
hvac
Ductwork
air conditioning
Mechanical
hvac

+1

Response time12 hrs
Response rate90%
1 neighbors recently requested a quote
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FAQs for air conditioning projects in Lexington, MA

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 Lexington, MA homeowners’ guide to air conditioning services

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