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 8895 reviews
GEM plumbing recently installed a ductless minisplit system in my home. The installers did an excellent job. They were extremely knowledgeable, courteous, and patient. They communicated with me every step of the way and took the time to answer all of my questions. The system is working beautifully. If you are looking for a contractor to install a ductless minisplit system, I highly recommend GEM plumbing.
I do wish it hadn’t been so expensive, but I will say I really did feel like my technician understood what he was doing. He was knowledgeable and professional. He explained things well and I’d be happy to work with him again.
William (Bill) and Antony arrived promptly and serviced my boiler system – everything is up and running smoothly (and the hot water is back).!
Dory was friendly, respectful, and went above and beyond!
Omar did an excellent job installing our central air conditioning system. Very efficient and friendly. He got the system up and running quickly and had a great attitude. Kept the house neat while cutting holes in the ceiling for vents. An all around positive experience.
Steve R was amazing and was super helpful and kind 10/10 would welcome back!!
Eliceo from Gem is a professional skilled technician. He explained the installation process and was organized and neat.
Very efficient and focused. They were in and out in no time.
Great job. Very helpful explaining what the problem and what to expect from the repair. Highly recommend Gem.
Walter and Anthony did a great job!
1st time using GEM for plumbing. Process was smooth, the workers were professional and diligent and kept me up to date the entire process. I highly recommend their services
Right on time, very knowledgeable about the issues I had. Great job fixing the leaks I had at home. No doubt I would recommend their service. Thank you Abraham.
Nice people, quick to respond and knowledgeable. Highly recommend them for emergencies. William T. was great, thank so much
First maintenance on our Generac. All went very smoothly!! Arrived within timeframe provided and even informed on actual arrival that day!
Very polite gentleman who went right to work, provided an update once maintenance was completed and explained basic process performed.
David S, our GEM technician was on time, respectful of our home and provided us with a thorough explanation of our GEM service contract and the scope of work completed and recommended. I would highly recommend him again!
Alec and Scott made quick work of what turned out to be a simple solution. Very efficient, pleasant and explained the issue and recommendation clearly.
Both service calls to my house were with Nick, and I can't say enough good things about him. He's professional, courteous, communicative, and thorough. My only hiccup with Gem has been conflicting information from the office, but even with hiccups the staff have been professional and friendly. Thank you, Gem! You're the best, Nick!
great guy! vaery talented and professional
Joseph (Junior) from GEM Plumbing & Heating came out to do a check on our HVAC system for this season. He was very thorough, knowledgeable, and honest. Our system is in great shape after 16 years. Thank you Joe!!! We were on a contract plan, which was very reasonable, so we paid nothing at the time of service.
Our tech was Joseph (junior), Incredible experience came out the same day.Billed me for the service. Exceptional diagnostics, developed a number of options to fix the problem. We called four other places.First three never showed one showed and walked away, without figuring anything out. Our A/C has been out for 6 wks waiting for people to not show up. YOU ABSOLUTELY MUST CALL GEM FIRST
GEM responded very quickly. I was out of state when my tenant called stating the A/c system wasn't working. I called GEM to see if they would be willing to help me. I didn't have an account with them but they were more than willing to assist me with my broken A/C system.
Nick the technician was very knowledgeable and worked with me while I was out of state and with my tenants. He articulated very well, explaining all the issues, what the repair process would involve and the cost. There were no surprises. My tenants informed me that Nick was terrific !
Nick got the system up and running. Overall, it was a very positive experience and I would highly recommend GEM to anyone.
Great service. Timely response and got the job done. It’s on the pricey side but that’s expected given their quick response time. Joe was particularly good and have had him out twice on our property. Thanks!
From beginning to end the experience was amazing. It started with my man Walter who calmly with humor explained the process and my guys Ben and his partner who took cared of me and my family. They were professional and very knowledgeable about the process. Their patience when not finding my well was welcome. Awesome job
Thank you
The people are nice, punctual, pleasant.
And best of all great prices. I'm very happy with the service.
I was very impressed with Dory . He was extremely knowledgeable and very helpful.

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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