Serving Gaithersburg and the Montgomery County region, GAC Services is your full-service plumbing, HVAC, and electrical team — available for residential & commercial needs. From emergency frozen pipe or water-heater repairs to furnace and air-conditioning tune-ups, whole-house generator installations, indoor air-quality upgrades, and electrical panel improvements, our licensed local team brings decades of experience, transparent pricing and respectful service you can count on. Winter is around the corner — let us keep your home or business safe, comfortable and running smoothly.
I called several AC contractors in the area, including one recommended by our general contractor, but learned the hard way that with AC/furnace work, higher price usually means higher quality — and that’s exactly what we got from this company.
We had a persistent problem: the blower motor/AC return vent was extremely loud, made worse by how little space there was between our townhouse and the shed housing the furnace/blower. Other contractors offered fixes that cost us money without solving the actual issue — the noise. This technician finally solved it, and his solution also helped with the high humidity problem we had.
TG
Thiala Caldas Greenstone
4 days ago
5.0
I had an exceptional experience with GAC from start to finish. I called at 7:00 a.m. on a holiday hoping to schedule a last-minute service appointment, and within just a few hours, our problem was completely resolved.
What impressed me most was Lawrence’s honesty and generosity. Rather than immediately scheduling a paid service call, he took the time to ask thoughtful questions to determine whether the issue might be something simple that I could check myself. He then stayed on the phone with me for well over 40 minutes, patiently walking me through different possibilities until we identified the problem.
Our well pump had stopped working, leaving us without water for nearly two days. Thanks to Lawrence’s expertise, we discovered it was simply a tripped breaker. He guided me through fixing it myself, restoring our water without ever needing to send someone out—and without charging us a single dollar.
That level of integrity is incredibly rare. Many companies would have gladly billed us for a service visit, but GAC chose to do what was right for the customer instead.
From the seamless scheduling process to Lawrence’s professionalism, knowledge, patience, and genuine kindness, every interaction exceeded my expectations. This was my first experience with GAC, but it certainly won’t be my last. They’ve earned my trust, and they’ll be my first call for any future home maintenance or electrical needs.
Thank you, Lawrence, for your outstanding service and for treating us with such honesty and care. Companies like GAC deserve to be recognized.
MC
Michael Calabro
Jul 1, 2026
5.0
Chun from GAC Services responded to my service request. My thermostat was showing an error message that my air conditioning blower motor was overheating. A different vendor the previous day told me I needed a new AC Unit at over $11,000 or preferably a whole new HVAC system at $18,500!
Chun performed a thorough inspection, and cleaned the inside and outside coils, opened vents, and changed the main capacitor. That has fixed the problem so far. He advised using different air filters, and that if I get another error message, I just need to change the motor at a very reasonable cost. I signed up for the GAC semi-annual maintenance program. I paid only a fraction of what I expected.
Chun was very patient and explained many things to me and showed me his findings inside my AC unit. He left a complete set of pictures with the invoice on my email.
It was an easy decision to give a 5-star rating to Chun from GAC Services.
MS
Mariko Shimomura
Jul 1, 2026
2.0
GAC replaced an HVAC part for me last year and in my annual inspection claimed it needed to be replaced again. Why would you install a part with a lifetime warranty that you have to replace the following year? They still charged me for labor. Also, when I said it was replaced last year, the tech mansplained to me that it was “over a year ago” - he’s correct, it was roughly 14 months ago but still 2025. Was that really necessary? This smacks of scam and price gouging and I’m seriously reconsidering my GAC membership.
LS
Lauren Salsman
Jun 30, 2026
1.0
This is a company that's obviously trying to replace as many people as it can with robots and probably underpaying all the people doing the actual work awhile setting them up for failure.
I wish I could post the almost five hours of chat history I have with an AI bot to try to figure out when the service tech was going to arrive after he was an hour late. I was told at least 20 times that I would get a call from a person within a minute to sort things out but the call never came. Overall I spent more than three hours in the phone queue (also promised a call back there after "pressing one"...another several calls that never came.
TLDR
$450 members price to snake a drain. (15 total minutes on site from the time the truck pulled into my driveway until it left)
More than an hour late with no call and no explanation
$50 discount toward future service for my trouble.
GAC Services provides heating, plumbing, electrical, and air conditioning contractor services.
Where is GAC Services located?
GAC Services is located at 227 E Deer Park Dr, Gaithersburg, MD 20877, US.
What are the business hours of GAC Services?
GAC Services operates Monday to Friday from 7:00 AM to 6:30 PM, and on Saturdays and Sundays from 7:30 AM to 4:00 PM.
How can I contact GAC Services?
You can contact GAC Services by phone at +1 301-202-1641 or via email at info@gacservices.com.
Does GAC Services have an online presence?
Yes, GAC Services has a website at http://www.gacservices.com and a Facebook page at https://www.facebook.com/127053190641387.
When was GAC Services established?
GAC Services was established in 1970.
What nearby public transportation can help me get to GAC Services?
Washington Grove, a nearby train station and landmark, can help customers access GAC Services conveniently.
Are there any nearby post offices close to GAC Services for mailing needs?
Yes, the US Post Office, United States Postal Service, and Washington Grove Post Office are all nearby for your mailing and postal needs.
What are some nearby places where I can relax or enjoy nature before or after visiting GAC Services?
Christman Park, located nearby, is a great place to relax and enjoy nature before or after your visit.
Are there any nearby dining options close to GAC Services?
Hershey’s Restaurant, an American restaurant and bar, is nearby and offers dining options for customers visiting GAC Services.
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