HVAC reviews in Gaithersburg, Maryland

The technician showed up on time and got straight to work. The setup was efficient and convenient. The technician handled the work on site while the supervisor joined by video. They walked me through everything and explained the system in clear terms. The team was professional, personable, and knowledgeable. The visit felt thorough and honest. I look forward to working with them again and becoming a long term customer. Great experience.

I recently had a full HVAC system replacement done by Michael Bonsby HVAC, Plumbing, & Electrical, and the experience was exceptional from start to finish. If you are looking for a reliable and professional team for your home comfort needs, look no further.
The process began with an insightful consultation with the Project Manager, Darnell. He was incredibly knowledgeable and took the time to assess our home’s specific needs rather than just giving us a generic quote. Darnell explained all our options clearly, answered every technical question we had, and ensured we felt confident in the system we chose. His professionalism and transparent communication set the tone for the entire project.
The installation crew arrived on time and was extremely respectful of our home. They worked efficiently, maintained a clean workspace, and handled the complex HVAC installation with impressive attention to detail. Once the unit was in place, the start up process was seamless. They walked us through the new controls and made sure the entire system was cycling perfectly before they left.
It is rare to find a company that excels in communication, technical skill, and customer service all at once. From Darnell’s expert guidance to the final quality checks, Michael Bonsby delivered a 5 star experience. Our new system is running beautifully, and we couldn’t be happier with the investment. I highly recommend them to anyone needing HVAC, plumbing, or electrical work.

I recently contacted Michael Bonsby HVAC, Plumbing, & Electrical for a furnace repair, and the service was outstanding. My technician, Yonas, arrived promptly and immediately diagnosed the issue with my heating system. He was incredibly professional and took the time to explain exactly what went wrong and how he intended to fix it, which gave me great peace of mind.
The entire repair process was handled with expert precision. Yonas clearly knows his craft, and he worked diligently to ensure my furnace was back up and running at peak efficiency. He was respectful of my home, kept the work area clean, and made sure to test the system thoroughly before finishing the job.
It is refreshing to work with a company that prioritizes quality and customer care. From the initial call to the final furnace start up, the experience was seamless and stress free. Thanks to Yonas and the team at Michael Bonsby, my home is warm and comfortable again. I highly recommend their services to anyone in need of reliable HVAC, plumbing, or electrical work.

Great Service and we are very satisfied .Thank you. We will keep coming back to you.

Great customer service!! Work was completed and cleaned up in timely manner. I will definitely call AMS again and will recommend to others. Thank you.

They came and fixed my Air Conditioning same day! They were prompt, friendly and budget friendly. I will not go anywhere else for HVAC repairs!

We had our HVAC system replaced by AMS and the entire process was seamless and professional. They provided clear explanations and transparent pricing during the consultation. The installation team Moshe, Ghal and Walter was prompt, efficient, and respectful of our home, completing the job on schedule. Since the replacement, our new system has improved our home's comfort and air quality noticeably. We highly recommend AMS for their expertise and customer-focused approach.

I had an Air Conditioning emergency on what was so far the hottest day of the year. Technician came out and fixed my AC same day. Not only he was quick it was affordable/ budget friendly. I will be needing a new Air Conditioning unit soon and I plan on using Gaithersburg AC and Heating- AMS in the future.

I had them come out and check out my 20 year old furnace that stopped working. The tech showed me and explained that it would be better to get a new system them to keep throwing money in to a 20 year old furnace. They put in a brand new bryant heat pump and man, my house is cozy warm now! Thank you Gaithersburg AC and Heating - AMS

Mannix adjusted their arrival time to my schedule which I did appreciate. The service man arrived within the time window and I was impressed by his professionalism and skill. He performed the service and explained to me what needed to be done. I would recommend this company to anyone needing thorough service carried

Mannix did a great job for us. Our technician, Keith, arrived on time and was very knowledgeable and helpful during the service call. We’ve used Mannix on two houses now and we’ll continue to recommend them.

I had the pleasure of having technician KP Pham service my furnace as part of my maintenance plan. KP was professional, prompt and personable. He was thorough in showing me and explaining everything he checked and performed. I was very happy with his service and will request his services for my spring checkup.
Thank you!

Just had KP complete my semi annual maintenance review of my heating system. He was courteous, efficient, thorough, gave me additional recommendations to keep my system running at top efficiency, and was very nice. Highly recommend Mannix and KP.

Emanuel Trejo did a professional and thorough job replacing a HVAC condensate pump. Nice person and represents Mannix very well!

18/01/25
So, we just had our first regular maintenance visit for our two new systems. We were very pleased with KP, our service tech, in terms of his thoroughness, timeliness and overall competence. We are also very appreciative of the email invoice with a _complete_ description (including photos) of his findings and conclusions. We continue to be well pleased with Mannix's service techs.
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12/24

We had to call in an emergency call into Mannix when our brand new furnace stopped heating in advance of a night in the teens. Rember Bonilla came out in short notice and was able to quickly and correctly diagnose the root cause of our non-functional furnace. While he was unable to fix the installation problem on the spot, Rember set us up for a next-day visit by the install team who were able to fix the original problem. We are very appreciative of Rember’s efforts, as well as those of Matt and Marcelino who came out the next day to conduct the repairs.

Edited to add our appreciation for Erick Aviles’ efforts who came out on equally short notice on Xmas eve, and who quickly and efficiently resolved a separate installation issue that only became apparent after the previous day’s repairs. A great team effort by the folks at Mannix.

KP did a great job. He was very thorough in assessing our systems and remedying a leak issue. I appreciated his professionalism and attention to detail!

I had a winter emergency with my heat giving out. Internal temperatures were 57 degrees! I called Mannix and they were and to get a tech out here incredibly fast. Mr. Silvio Guerrero is the guy that saved the day. He was professional, efficient, on time, and funny! I'm grateful for how quickly he arrived, and of course, how quickly he brought heat back to my home. Thanks, Silvio!

Although our heat pump decided to fail during the peak of January 2025’s polar vortex, we received prompt and stellar service from Mannix. Thank you to Erick Avilés for diagnosing not only the source of the leak in the coil but also the danger posed by a shorted out heat box. We’ve been happy customers of Mannix for years, and today reminds me why and how this company earned our trust!

Outstanding maintenance service by KP Pham and Rember Bonilla. They arrived on time despite of the snow and ice.

We have been using Mannix for our annual HVAC maintenance for several years. KP was on time, very friendly, and thorough in the inspection of our unit. Highly recommend the MD office.

Emanuel was fabulous when he came to do our winter service. He spent time checking our two furnaces, including the outside parts buried in snow, and took the time to check the ductwork in our attic at my husband’s request. We have always had excellent service from Mannix Heating and Cooling.