When heating or cooling problems arise unexpectedly, LoneStar HVAC-R LLC is the name to remember for prompt and dependable emergency HVAC service in the Dallas-Fort Worth area. With a staff of highly qualified professionals available 24 hours a day, seven days a week, you can expect immediate assistance when you need it the most. Whether it's an unexpected breakdown in the middle of the night, a faulty furnace in the winter, or an air conditioning failure on a hot summer day, our technicians arrive quickly with the tools and knowledge to restore comfort to your home or office.