Proudly Serving the Wilmington, NC Area Since 1981.


In-Home Evaluation For HVAC Replacement

Time to replace your heating and air system? O’Brien Service Company offers complimentary in-home evaluations. Watch this video to learn what to expect when an O’Brien Design Specialist visits your home and why it’s important.

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Join The Energy Savings Club

Receive Annual Maintenance Plus Other Benefits


“Just as a tune-up for your car can improve your gas mileage, a yearly tune-up of your heating and cooling system can improve efficiency and comfort.”EnergyStar


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Mary T. (Wilmington, 28411)
"O'Brien came into my home several times for work needed over the years and they have done awesome work. Everyone I dealt with in this company is so helpful and so very nice. I really can't say enough about them." - Mary T. (Wilmington, 28411)
Scott D. (Leland, 28451)
"They arrived on time, kept me informed of their progress, and gave me good feedback regarding my system." - Scott D. (Leland, 28451)
Homer S. (Wilmington, 28405)
"O'Brien Service Company installed a new HVAC system in our condo. It was a great experience from the sale to the installation. Mike R., our design specialist, did an outstanding job of explaining our options and helping us make the choice that was best for us. He continued to be easily accessible throughout the entire process. The installation went smoothly and was completed in a timely manner. Chris, our lead installation technician, did a great job wrapping up the installation by explaining the proper use of the thermostat and our new system. He also answered any questions that we had. We are very pleased and highly recommend O'Brien Service Company." - Homer S. (Wilmington, 28405)
Jerry J. (Leland, 28451)
"O'Brien Service Co. has replaced and installed two Trane HVAC units (3 zones) for us. They did an excellent job, both times (2018 and 2021). Matt C. was a pleasure to deal with. He explained our options and answered our many questions and even helped us with the Trane app set up. Wish we could remember the names of the installation crew but I'm sure you have them on record. They were all great - respectful, polite, professional, and punctual! I highly recommend O'Brien Service Co." - Jerry J. (Leland, 28451)
Gary S. (Wilmington, 28411)
"Fabulous service. Their serviceman Aaron is the best a company could have. On-time, thorough, explained the service performed in a very good and courteous way. We recommend this company to everyone and use them exclusively at all 3 of our properties." - Gary S. (Wilmington, 28411)
Allan N. (Wilmington, 28405)
"Had a stopped up drip line on the AC and he unclogged it and adjusted other things. I'm very satisfied with the service." - Allan N. (Wilmington, 28405)
Steve and Sheila K. (Leland, 28451)
"Did a good assessment of our needs and what we wanted. Expert installation and cleaned area after they were finished. Several people involved in the whole process from beginning to end, but they coordinated everything, and worked well together." - Steve and Sheila K. (Leland, 28451)


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Air Conditioner Repair in Wilmington NC

Needing a repair on your heating and air system is no way to start the Spring and Summer months! A refrigerant leak or a clogged drain line are two