October Is Breast Cancer Awareness Month

Proceeds of New Installations to Benefit The Gloria Gemma Breast Cancer Research Foundation

GEM service team posing together in front of branded vehicle

Revolutionary Standards

The birthplace of American liberty deserves AC service that meets modern expectations.

Lexington’s blend of Revolutionary history and contemporary excellence creates a community that expects quality in everything. When summer humidity arrives and your cooling system fails, the disruption affects families who’ve chosen this town for its schools, safety, and character.

GEM Plumbing & Heating Services, LLC has been solving these problems for New England families since 1949. Our NATE-certified technicians arrive prepared, diagnose accurately, and repair correctly the first time. Same-day appointments, 24/7 emergency response, and honest pricing mean your comfort returns without complications. Call GEM today for air conditioning repair services in Lexington.

(833) 222-2953


24/7 Emergency AC Repairs

Historic significance doesn’t pause for AC problems. Neither do we.

When your system fails overnight or on a weekend, GEM responds. Our technicians are available around the clock.

(833) 222-2953


Call GEM. We’re in Your Neighborhood!

GEM serves all Lexington neighborhoods and surrounding Middlesex County.

Our technicians work throughout town, from the historic homes near the Battle Green to the established neighborhoods of Follen Hill, from properties near the Minuteman Bikeway to the larger homes in the western sections.

Whether you have a colonial on a wooded lot, a contemporary home in a newer development, or a historic property in the town center, we understand the varied housing stock and cooling demands across Lexington. One of New England’s largest HVAC fleets keeps a GEM truck nearby whenever you need us. Need AC repair services in Lexington? Give GEM a call today!

Years in Business

Skilled employees

Emergency Service

Trucks on the Road

GEM technician working on indoor HVAC system with homeowner

(833) 222-2953

It’s Easy to Schedule Your AC Repair With GEM!

Between commuting and family activities, service should be seamless.

We make it that way.

GEM technicians arrive when scheduled, equipped for common repairs.

You see the complete cost before work begins. That’s what you pay.

Our NATE-certified technicians find actual problems and fix them right.

Every repair is tested before we leave.

We Repair All Types of AC Issues in Lexington

Historic homes and contemporary construction present different challenges.

GEM’s air conditioning repair team handles every type of problem Lexington homeowners encounter.

Lexington’s 18th and 19th century homes require thoughtful integration of modern comfort. Our air conditioning repair technicians in Lexington work within historic constraints.

Substantial Lexington properties need properly sized equipment. GEM’s air conditioning repair specialists in Lexington evaluate capacity.

Multi-zone installations sometimes develop coordination problems. Our Lexington team troubleshoots controls and dampers.

Tree cover creates humidity near homes. GEM’s air conditioning repair technicians in Lexington ensure proper dehumidification.

Updated homes may have duct configurations that don’t perform optimally. Our air conditioning repair team in Lexington identifies airflow issues.

Many Lexington homes have systems approaching end of life. GEM provides expert air conditioning repair in Lexington and honest replacement advice.

GEM service vehicles parked outside customer home

(833) 222-2953

GEM Technician Explaining Plans to Customer

(833) 222-2953

Why Work With GEM for AC Repair Services in Lexington?

A community built on high standards deserves service to match.

GEM has delivered since 1949.

500 service vehicles. 700+ employees. GEM has the resources to serve Lexington promptly, whether you’re near the Battle Green or out toward Burlington Road. 

When your system fails during a summer heat wave, GEM offers same-day air conditioning repair throughout Lexington. Colonial homes and mid-century ranches both need fast response when temperatures climb.

Middlesex County families rely on GEM because we consistently deliver quality work. From the historic district to quieter neighborhoods off Route 2A, Lexington homeowners count on our technicians.

The quote we give is the price you pay. No surprises after the work is done.

Heating, cooling, plumbing, electrical. One company for everything your Lexington home needs.


What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 9524 reviews
Stephen Crowell
21 hours ago
Christopher did a very good job. Explained everything very well.
Bob Slott
23 hours ago
Douglas was courteous and efficient.
John Walsh
1 day ago
Very professional , great communicator, also neat and tidy. Aaron is very knowledgeable and professional.
Donald Watts
2 days ago
The techs were early and all I did was show them the generator. They did their job with no problems
Janet Secatore
2 days ago
Sorry for the delay in rating the service I got for my HVAC checkup in September. It went as expected and the two service men were efficient, courteous and communicative. Thanks!
Daniel Linger
3 days ago
In a world where you call HVAC companies and either get no answer, an AI receptionist or a human who takes all your information just to tell you they can’t service you until next week, these guys were a breath of fresh air! Same day service. Fair price. Incredibly kind people from the receptionist to the service worker. Thank you guys!
Jodi Livermore
3 days ago
I was so grateful to get such quick, great service, especially on a holiday weekend. Devin was excellent, explaining everything to me and making recommendations. My go to company for all future plumbing needs!
Brendan Murphy
3 days ago
Incredible job on short notice- will definitely use again. Helpful, responsive, and professional which is exactly what you want with a plumber.
Bruce Keeler
4 days ago
Excellent service from Davontay and Anthony. They were quick and explained what they were doing in an easily understandable manner. Great representatives of the company!
Ed Wirtanen
4 days ago
I called GEM for an issue concerning my the cold water intake for my washing machine. Chris responded within a couple of hours and promptly identified the problem and installed the new part. He is very customer focused and thorough. Chris is a very friendly guy with an objective to make the job is done right.
Susan McCaffrey
5 days ago
Excellent professional service!
Barbara Amiro
5 days ago
I was very pleased with Aaron N. professionalism in servicing our water heater. This service is included in my service plan.
On time. Pleasant. Introduced themselves. Went over the work completed. Left the area clean.
Steven sogoloff
6 days ago
We did a maintenance request for our heating system. Christian and Joie were very pleasant and gave us the results based on their analysis of the system. They arrived within the time frame and completed the process in about 30 minutes.
Joanne Iachetta
6 days ago
Showed up when expected. So kind and courteous and explained everything to me that would need to be done for my plumbing issue. Would highly recommend GEM.
Vin Milano
6 days ago
Erickson was great! Explained conditions of units and recommendations for upkeep!
Doug Williams
7 days ago
The service was good.Aiden was very good. It’s just they said they were on there way 2hrs and30 min they finally arrived. Waited all afternoon
The 2 service men were on time, assessed the problem, diagnosed the issue, came up with a plan and offered several solutions for fixing our mini split. They took pictures, tried clearing out mice debris , attempted to get the outside machine to work ( apex 2 hours) Alas a no go, so we decided to scrap it and go with baseboard heater for the room over the garage. Up front information and pricing , no nonsense. Affable techs and so far great service.
Doug Dustin
1 week ago
I would recommend Nathan and GEM in the event of a plumbing emergency and or issue
David Polishook
1 week ago
No repair was performed at this time I had to pay a diagnostic fee.
Eaven though I was very specific what toilet I wanted they put the wrong one in.
Kristen Mouris
1 week ago
Absolutely incredible and fast service from Nicole T! Our upstairs toilet began leaking Saturday night and by noon on Monday we had a new toilet! Nicole was super informative and walked us through our different options every step of the way. She made an otherwise stressful situation so much easier!
Robert Mason
1 week ago
I had a great experience with Gem Plumbing and Heating. It was great starting from the initial phone conversation and continued with Brian Ciaschini. Brian was an excellent electrician, he was cordial, informative and helpful. Brian made sure everything was working perfectly! I would recommend them and I will use them again.
Friendly, efficient working time, knowledgable!
keith farnham
1 week ago
Excellent as always

What to Expect When You Work With GEM

Excellence should be standard practice.

At GEM, it is.

Our NATE-certified professionals arrive on time and respect your property.

We explain what’s wrong and present options honestly.

Your price is set before work starts. The invoice matches what you approved.

As a Carrier Factory Authorized Dealer and Mass Save® partner, GEM maintains standards.

GEM Plumbing Heating Cooling & Electrical branded technician portrait

(833) 222-2953

customer and technician interaction

Prevent Future AC Problems With GEM’s Home Comfort Club!

Proactive maintenance protects your investment.

GEM’s Home Comfort Club gives Lexington homeowners annual tune-ups that catch problems before they become failures. Members receive priority scheduling and repair discounts. Contact us to enroll or learn more!


Other HVAC Services You May Need


Schedule Air Conditioning Repair in Lexington, MA With GEM

When your cooling system is not operating the way it should, GEM provides dependable service built on detailed diagnostics and effective repair solutions. Our technicians focus on correcting system issues and restoring reliable cooling performance throughout your home.

From routine service calls to complete air conditioning repair in Lexington, MA, every visit is handled by experienced professionals who emphasize precision, efficiency, and long term reliability.

GEM technician in front of service truck


FAQ

Do you provide same-day AC repair in Lexington?

Yes. GEM offers same-day air conditioning repair throughout Lexington, from homes near the Minuteman Bikeway to properties along Marrett Road.

Can you work on AC in Lexington’s historic homes?

Absolutely. Many Lexington homes date back generations, with original construction that wasn’t designed for central cooling. We’re experienced with the ductwork challenges, insulation limitations, and layout constraints that come with retrofitting AC in historic properties.

What energy rebates are available to Lexington homeowners?

As a Mass Save® partner, GEM helps Lexington residents access rebates on qualifying high-efficiency equipment and system upgrades. We handle the paperwork so you get every dollar you’re eligible for.

Why does my wooded Lexington lot stay humid?

Lexington’s mature tree canopy traps moisture, particularly in neighborhoods with heavy oak and maple coverage. If your home feels clammy even when the AC runs, you may have undersized equipment, drainage problems with your condensate line, or your system may benefit from whole-home dehumidification.

How often should Lexington homeowners schedule AC maintenance?

Annual maintenance is recommended for all Lexington homes. Systems cooling older construction or working against humidity from wooded lots benefit especially from regular professional tune-ups that keep efficiency high and catch wear before it becomes failure.

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