Service First AC Repair and Plumbing is a HVAC & plumbing company that services the San Antonio and surrounding areas. Our services includes AC installation and replacement, Commercial HVAC, Residential AC, Preventive maintenance, Thermostat install and replacement, Coil cleaning, Heater replacement and installation, heater maintenance, plumbing installation, plumbing repairs and water heaters. Call Today. Phone no (210)-521-1500 24 Hours Open