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. Call us any time at (301) 202-1641.
Technicians are consistently described as professional, courteous, and knowledgeable, providing thorough explanations of their work.
Customer Service
While many customers praised the service, there were significant complaints about poor communication and follow-through, especially regarding urgent issues.
Quality of Work
Most reviews highlight high-quality service and effective problem-solving, although there were isolated incidents of poor installation and unresolved issues.
Timeliness
Many customers appreciated the promptness of technicians, though some reported delays and scheduling issues.
Trustworthiness
Several customers expressed trust in the company due to honest assessments and transparency during service visits.
DC
Daniel Chau
2 days ago
5.0
The first time I use GAC services: heating and air conditioning, Charly he a good guy And professional man for Heating services: good job and good services, besides he explained everything he did it specifically he recommends I use the membership for Heating and AC conditioning maintenance. Good idea for home …. No problem about AC & heating because they will recommend us everything so five stars for Charly …. Good guy and good services Thanks again Charly Choe !
RB
Robert Bailey
3 days ago
5.0
We had bought our house earlier this year and needed a safety inspection. Bruce M came out and was amazing! He helped check our breaker, explained some of the new electrical codes, and replaced a few faulty light switches. The price was fair and Bruce explained everything he was doing and what he would recommend we do to ensure our home was safe. He was extremely professional and we would highly recommend him and GAC for any electrical needs!
AJ
Arlynn Joffe
Nov 26, 2025
5.0
I will be asking for Chad in the future when I contact GAC for service. He was extremely knowledgeable, professional and helpful at explaining my heating issues. While it took two visits to fully inspect the heating system he was able to replace the inducer and conduction pump. I’ve never seen so many wires that needed to be disconnected and then replaced! Thanks to Chad my system is now running properly and efficiently. Ten stars for Chad!!!
EE
Elaine Estrella
Nov 25, 2025
5.0
Chad came in very professional and I led him to where the system is. He did his own thing and afterwards let me know everything is all set. I asked for some education on how to maintain it thru the year and he gave a lot of guidance and advice which I truly appreciate. It is an investment to have someone like Chad come in to make sure my home is safe and habitable for years to come.
NL
Nicole Lewis
Nov 18, 2025
1.0
If I could give this company zero stars, I would. We had a brand-new HVAC unit installed in May, and the installation was done incorrectly from day one. The unit leaked through the drywall, causing damage to our home. After numerous appointments, repairs, and wasted time, the system finally seemed to be working—until heat season arrived.
When we turned the heat on, the system worked for exactly five days before the blower stopped shutting off. What followed has been nothing less than a complete nightmare. Despite multiple phone calls, the company showed no urgency whatsoever in addressing the situation. We waited days for service because they simply couldn’t “fit us in,” even though this was clearly an issue directly tied to their faulty installation.
Several technicians came out, multiple “fixes” were attempted, and new parts were ordered and installed. The system worked again—for five days—before breaking down yet again. Each time, I contacted the customer service line only to be met with complete indifference. No urgency. No follow-through. And trying to escalate to a supervisor? Nearly impossible. Calls were promised, and none were returned.
After the most recent visit, another new part was ordered. While I understand the company cannot control manufacturer delays, what they can control is communication and customer service—which they have utterly failed to provide. Today, I called again for an update, was told I’d receive a return call, waited hours, and heard nothing. When I called back, I was given the exact same information I received a week ago. I asked again for a supervisor to contact me. No one ever called.
This is the lowest form of customer service I have ever experienced. It is painfully obvious that, because this job is now under warranty and they aren’t making additional money from it, my issue is no longer a priority to them. We paid thousands of dollars for a new system and have now been without functional heat for over a month. Completely unacceptable.
Save yourself the frustration, the time, and the money. Choose another HVAC company—one that actually stands behind their work and values its customers