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.

Learn more

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


Learn More


Annual Maintenance – (Southport, 28461)
Came on time. Very efficient. Provided a detailed list of the services provided and described the condition of the HVAC system.” – Patrick M.
No Cooling – Wilmington, 28403
Josh went way beyond in completing this job- my unit is in better shape than ever before.” – Beth B.
Annual Maintenance – Wilmington, 28409
As always, great service and an incredible staff. We would never use anyone else.” – James T.


Leave A Review



Power Outages and Your HVAC System

*When calling during or after a big storm, we ask you to please leave only one message with your name, contact info, and your reason for calling. 

A Trane System For Christmas!

New Trane Heat Pump, Trane Air Handler, and Trane Thermostat! Every year, O'Brien Service Company donates a Trane heat pump, Trane air handler,

O’Brien Service Company History

O'Brien Service Company owner Jimmy Williams was born and raised in Wilmington, His dream was to one day work for GE as a machinist. Instead, he was