. Hitech PTAC Service NYC espcializes in full-service air conditioner repair in New York. If your PTAC units are not functioning properly, call us for information about our PTAC repair and maintenance services. We are a licensed and certified company that specializes in all aspects of about all of our PTAC units. And with our years of expertise in air conditioner and heater repair, our cooling system services are the. best around. So please, reach out to us today for more information services.