For over 20 years, the folks at Service First Air Conditioning and Heating have continued to provide excellent HVAC, air conditioning, and heating services to the people of south Texas. Headquartered in San Antonio and serving the greater south Texas area, Service First Air Conditioning and Heating is open 24 hours a day, 7 days a week for quick emergency AC repairs! Call today to schedule a free in-home estimate. A friendly member of our staff will be at your door fast to diagnose the problem with your ac, and after a free estimate and approval, fix the problem fast. Call today!