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 8761 reviews
I am very pleased with ALex's service. He is knowledgeable and polite.
The technician arrived. He came in and diagnosed the problem with my ductless system. He was able to get my system functioning, even though he didn’t have the pot needed to be replaced so temporarily we can run the system as it is he did he did his job by diagnosing the issue and doing a temporary fix?
I called GEM for a weekend, short notice pipe repair, and everyone was great from Hendry who I spoke to on the phone, to the two technicians Alec and Danny. They worked quickly, communicated clearly, and worked with me to come up with a solution I was happy with the price and result of. I would definitely call them in the future when things pop up.
Can’t say enough good things about Gem Plumbing and Thomas in particular. I easily got a came day appointment, Thomas the tech was here in the agreed upon window, provided 2 alternative estimates and once we selected, he completed the job right away – no need to make another appointment and come back another day. Great work, and even better service!
Chris A diagnosed my tankless water heater problem and repaired it quickly and efficiently. He answered all my questions with clear answers and was very helpful in alleviating any of my concerns. He gave excellent service!
Fast and knowledgeable service technicians.
William and Mark were excellent! They explained everything that they were doing and included us through the whole process. Would recommend them highly.
Very prompt and professional service!
The service provided by Mark and his partner was incredible. They took the time to explain all details of the situation and even helped make a call to a remediation company. They cleaned up after themselves and were very easy to discuss the repair process with.
Always a pleasure, professional expert service. Solving any problem simple or difficult!
Came even late at night to make sure we had working air conditioning
The team that installed the unit (Luis Herrera Mezquita Et al) was very professional and explained things thoroughly. I would highly recommend them.
Great customer service and understanding with us, and answered all our questions.
Knowledgeable technician attended to services thoroughly and had answers to all questions. Also helped with moving some furniture to ensure he could have enough working space. Very well done!
Fast service, clean work and AWESOME service guys!!!
My toilet stopped working this morning. I called Gem Plumbing at around 12:30pm and with an hour or so Nicole Tradd Technician was at my door. She did a fabulous job removing and replacing my toilet. She was very pleasant and friendly from start to finish! Great customer service all around!
Ricky from GEM was awesome. Second time he has taken care of something for us over the years !!!
Outstanding service!
Anthony was exceptional. He explained everything to me prior to repair. Repaired everything carefully and neatly done. Cleaned everything when done. GREAT JOB!!
Very thorough, efficient and courteous! Chris was extremely professional in completing my AC system maintenance. Thank you for a great job!
. GEM came for heat pump ac semi annual maintenance
As always very pleased to have GEM for all of my plumbing and electrical needs!
Thank you GEM
Was very impressed with Gems
Tech who was able to repair our AC units during our first real heat wave.
Hope to do business with Gem at our new home soon
Thomas from GEM came out today for my annual air-conditioning service, and I couldn’t be more impressed. He performed a thorough inspection, topped off all the necessary fluids, checked and adjusted my filters, and made sure everything was running smoothly and efficiently.

What really went above and beyond was that he noticed a hornets’ nest growing next to my air-conditioning unit and took care of it for me on the spot. That was something I hadn’t even realized needed attention, and it saved me from a potentially unpleasant surprise later on!

Thomas was professional, knowledgeable, and incredibly helpful throughout the entire visit. It’s rare to find someone who pays such close attention to the details and takes such pride in their work. GEM is fortunate to have him on their team. Thank you, Thomas, for the outstanding service!
Technicians were highly qualified. Very knowledgeable and professional. Respectful towards me and my home. Completed installation with in timeframe and cleaned up the areas they worked in. My issue is with whoever issued the system’s equipment. After 6 hours of working the technicians discovered they had been given the wrong system until! Resulting in them having to return for another 6 hour work day! This resulted in an additional day of inconvenience for myself and my family. No one from the Gem administration/management team has contacted me to apologize or offer reconciliation. I am happy with the product and the performance of the technical staff. But not with the treatment from management.
We had a tree branch fall and take out all of our electric equipment. GEM answered immediately and got someone out quickly. Mike Alberto got the job done quickly and explained everything as he went along. Great job!

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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