GAC Services

4.9
6367 reviews

About

Heating ContractorPlumberElectricianAir Conditioning Contractor
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.

Location

GAC Services
227 E Deer Park Dr, Gaithersburg, MD
20877, United States

Hours

Reviews

4.9
6,367 reviews
5 stars
6,017
4 stars
165
3 stars
24
2 stars
31
1 star
130

What are people saying?

AI-generated from recent customer reviews

Professionalism

Technicians are consistently described as professional, knowledgeable, and courteous.

Customer Service

Many customers praised the friendly and helpful nature of the staff, both in-person and over the phone.

Punctuality

Most reviews highlight the technicians' punctuality and timely arrival for appointments.

Communication

Technicians effectively communicated the issues and solutions, providing clear explanations to customers.

Quality of Work

Customers reported high satisfaction with the quality of work performed, including thorough inspections and repairs.
  • ET
    Elaine Thompson
    5 days ago
    1.0
    Technician arrived late, at the very end of the repair window. I told him I had limited time. He did the furnace check, said he was done, but it was a blatant LIE. I was almost out the door but 10 minutes later my landlady called and told me he was coming back in. He LIED to "be confidential", didn't have the honesty to say he might be back so I could change my plans. He finished a full hour outside the repair window. These are very dishonest techs who have no respect for your time.
  • NL
    Nicole Lewis
    6 days ago
    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
  • AH
    Alorin Harris
    Nov 15, 2025
    4.0
    I had a 12-5 arrival window and the office called at 4, saying it may be after 5, and asked if I wanted to reschedule. I don’t have random open 5 hr blocks of time so I declined. The tech called at 4:20 saying they would be there in 30 min. They arrived at 5:10. That’s 50 min. They told me it would be 30-40 min to complete the service but they didn’t know I have 2 systems so it was over an hr. Why didn’t they know?? The co. Has been here numerous times. Shouldn’t the techs have that info? Then they said they were going to change a filter and asked me if i had one. Is the filter not included in the maintenance contract cost?
  • DF
    Daylilies5 flc
    Nov 10, 2025
    5.0
    GAC Services and Alfredo Diaz were outstanding in their service of our heating system. They responded to our after-hours call and arrived promptly the next afternoon. Alfredo quickly determined that the heater's motor was not working, but he didn’t stop there. He fully examined the system to determined that a toy car was blocking the motor (not sure how that happened as we don't have young children). Once the toy was extracted, the heater has been humming great (pun intended). For our future needs, I hope we can request Alfredo's services again. Thank you!
  • MS
    Matthew Shapiro
    Nov 4, 2025
    1.0
    GAC Services Installation Review I chose GAC because of their “Quality Assurance” program and promise of professional installation. Unfortunately, my experience was the opposite. The crew arrived unprepared and untrained, with no wiring diagrams or familiarity with the new Bryant Evolution Series system I purchased. They even broke a valve during installation — something that shouldn’t happen with proper training. After hours of trial-and-error, they finally got one unit working around 7:30 p.m., but left most of my home without AC and a mess of trash behind. To top it off, the system later failed inspection. There was even arguing among employees outside in front of my neighbors — completely unprofessional. Overall, this was one failure after another. I expected better from a company that advertises “quality assurance.”

Frequently Asked Questions About GAC Services

What services does GAC Services offer?

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.